The ratio of the number of girls to the number of adults is 5 : 1.
What is the ratio?Ratio is used to compare two or more values together. Ratio shows the frequency of one number compared to the frequency of another number. The sign that is used to represent ratio is :.
The ratio of the number of girls to the number of adults = number of girls : number of adults
number of girls = 100
number of adults = 20
The ratio of the number of girls to the number of adults = 100 : 20
Express the ratio in its simplest form. To do this, divide both numbers by the greatest common factor of 100 and 20. The greatest common factor of 100 and 20 is 20.
The ratio of the number of girls to the number of adults = 5 : 1
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How many terms are in this expression?
7a+ 1 + 8b
Answer:
3
Step-by-step explanation:
There are 3 terms. The terms are separated by + signs. They can also be separated by - signs.
The terms are 7a, 1, 8b.
If there was a minus sign in front of the term you need to keep it with the term because it is a negative term.
Answer:
There are a total of 3 terms
Step-by-step explanation:
A term is either a single number or variable, or the product of several numbers or variables. Terms are separated by a + or - sign in an overall expression. We are basically counting how many individual mathematical expressions
7a is a term
1 is a term, and it's a constant
8b is a term
The ice cream shop sells cones for two dollars and sundaes for three dollars. Rachel makes a table to compare the cost of the ice cream treats. Part A: complete the pattern on the table for the cost of 0, 1, 2, and 3 ice cream treats. Then write the ordered pair for each row.
Given:
The cost of the cone is $2.
The cost of sundaes is $3.
Required:
Cost of cone and sundaes for different values.
The table for the data is:
Cost of ice-cream cone cost of ice-cream sundaes ordered pair
0 0 (0,0)
2 3 (2,3)
4 6 (4,6)
6 9 (6,9)
Hence, the missing values of the table is obtained.
5.
Examine the diagram at right. Then use the
information provided in the diagram to find the
measures of angles a, b, c, and d. For each angle,
name the relationship from your Angle
Relationships Toolkit that helped justify your
conclusion. For example, did you use vertical
angles? If not, what type of angle did you use?
Based on angle relationships, the missing angle measures are:
a = 118° [same side exterior angles]
b = 118° [vertical angles]
c = 32° [Linear pair]
d = 32° [same side interior angles]
How to use Angle Relationship to Find to Find Measures of Angles?Some of the angle relationships that can be used to determine the measures of angles that are formed when two parallel lines are intersected by a transversal are:
Same side exterior angles, which are said to be supplementary, that is, they have a sum that equals 180 degrees.Vertical angles which are equal in measure.Same side interior angles are usually equal to each other.Linear pair which have a sum of 180 degrees.Using angle relationships, the following angle measures are determined as follows:
a = 180 - 62 = 118° [same side exterior angles]
b = a [vertical angles]
b = 118°
c = 180 - 148 [Linear pair]
c = 32°
d = 2 [same side interior angles]
d = 32°
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2. How much heat in kilojoules has to be removed from 225g of water to lower its temperature from 25.0oC to 10.0oC?
Answer:
-14.1 kJ
Step-by-step explanation:
We need the specific heat of water, which is 4.184 J/g-K. It means that 4.184 Joules of energy will raise 1 gram of water by 1 degree Kelvin. It also means that removing 4.184 Joules of energy will lower the temperature of 1 gram of water by 1 degree Kelvin.
We want to lower the temperature by 15 degrees C (-15C). That is also -15K. We have 225 grams of water.
This can be used in the equation q = mc(T2 - T1),
where q is the heat, or energy, m is the mass, c is the specific heat, and (T2-T1) is the temperature change, in Kelvin.
q = mc(T2 - T1)
q = (225g)(4.184 J/g-K)(10K - 25K)
q = (225g)(4.184 J/g-K)(-15K)
q = -14121 J or -14.1 kJ
It is negative because heat is leaving the system.
Help please. Was absent due to medical issues and trying to catch myself up and learn it now.
We paint with:
• red the regions where the function is decreasing,
,• green the regions where the function is increasing.
From the graph, we see that the function is:
• decreasing in the intervals (-∞, -1.5) and (2, ∞),
,• increasing in the interval (-1.5, 2).
Answer
• Increasing on the interval(s): ,(-∞, -1.5), (2, ∞)
,• Decreasing on the interval(s): ,(-1.5, 2)
PLEASE HELP ME ILL RATE YOU 5 STARS AND GIVE U BRAINLY
The ascending order of the set of numbers is √3 - 1, 2√10 ÷ 5, √14, 3√2, √19 + 1, 6
Given,
A set of numbers;
3√2, √3 - 1, √19 + 1, 6, 2√10 ÷ 5, √14
We have to arrange this numbers from least to greatest. That is, in ascending order.
Ascending order;
Numbers can be arranged in ascending order, from least value to highest value. The arrangement is left to right. Increasing order is another name for ascending order.
Here,
First we have to find the values of the square roots in the numbers.
3√2 = 4.24
√3 - 1 = 0.73
√19 + 1 = 5.36
6
2√10 ÷ 5 = 1.26
√14 = 3.74
Then,
6 is the greatest number and √3 - 1 is the least number.
That is,
The ascending order of the set of numbers is √3 - 1, 2√10 ÷ 5, √14, 3√2, √19 + 1, 6
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8g - 7 = 18 + 3g
SOLVE EQUATION PLEASE
Answer:
g = 5
Step-by-step explanation:
8g - 7 = 18 + 3g
add 7 to both sides:
8g - 7 + 7 = 18 + 3g + 7
8g = 25 + 3g
subtract 3g from both sides:
8g - 3g = 25 + 3g - 3g
5g = 25
divide both sides by 5:
5g/5 = 25/5
g = 5
You start at (2, -5). You move up 5 units and right 3 units. Where do you end?
the answer would be (0,5)
what is the equation of the line perpendicular to y = 1/2x+1 that contains the point ( - 2 ,1)
The linear equation perpendicular to y = 1/2x+1 that contains the point ( - 2 ,1) is:
y = -2x - 3
How to get the equation of the perpendicular line?Let's say that:
y = m*x + b
Where m is the slope and b is the y-intercept.
Is the line we want to find.
Two lines are perpendicular if the product between the slopes is -1, so this line is perpendicular to:
y = (1/2)*x + 1
Only if:
m*(1/2) = -1
m = -1*2 = -2
So the linear equation is of the form:
y = -2*x + b
If this line passes through (-2, 1), then:
1 = -2*(-2) + b
1 = 4 + b
1 - 4 = b
-3 =b
The linear equation is y = -2x - 3
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What number should be the exponent on the 10 so that the two numbers are equivalent? 75.6 - 10% = 0.00756 y = -3 C y = 3 c y y = 4 y = 4 =
Answer:
y = -4
Explanation:
Given the equation:
[tex]75.6\times10^y=0.00756[/tex][tex]\begin{gathered} 0.00756=7.56\times10^{-3} \\ =75.6\times10^{-4} \end{gathered}[/tex]Thus, the number is -4.
As a Nurse, part of your daily duties is to mix medications in the proper proportions for your patients. For one of your regular patients, you always mix Medication A with Medication B in the same proportion. Last week, your patients doctor indicated that you should mix 130 milligrams of Medication A with 117 milligrams of Medication B. How many milligrams of Medication A should be mixed this week?
60 milligrams of medication A should be used this week
Explanation:Given:
Last week, 130 milligrams of Medication A was mixed with 117 milligrams of Medication B
This week, 54 milligrams of medication B was used
To find:
the milligrams for medication A used this week
To determine the milligrams of medication A used, we will apply the ratio of medication A to B
Last week:
A : B = 130 : 117
This week:
A : B = A : 54
[tex]\begin{gathered} eqating\text{ both ratios:} \\ A:B\text{ = A : }B \\ 130:\text{ 117 = A :}54 \\ \\ \frac{130}{117}=\text{ }\frac{A}{54} \\ cross\text{ multiply:} \\ 130(54)\text{ = 117\lparen A\rparen} \end{gathered}[/tex][tex]\begin{gathered} A=\text{ }\frac{130\times54}{117} \\ A=\text{ 60} \end{gathered}[/tex]Hence, 60 milligrams of medication A should be used this week
DS
6) You and five friends went out to a movie. You all
shared a large tub of popcorn that cost $16.50,
and you ordered individual boxes of candy that
cost $3,72 per person. You and your friends decide
to split the bill evenly. How much did each of you
pay?
Answer:
You would each pay $6.42
Have a good one!
9. Determine where the graph represents a function explain your answer.
The vertical line test is a visual test to determine if a graph represents a function; since a function can only have one output for every input if a vertical line intersects a curve in more that one point the it is not the graph of a function.
In this case we any vertical line will only intersect one point then we conclude that:
The graph represents a function. Using the vertical line test, the graph intersects any vertical line at only one point.
Isaiah's school is having a spring carnival. When Isaiah carries a bin of water balloons outside for the balloon toss, he trips and breaks 12 balloons. He counts the remaining water balloons, and there are 14 left. Which equation can you use to find the number of water balloons w in the bin before Isaiah trips?
Solve this equation for w to find the number of water balloons in the bin. Water balloons
Equation: w - 12 = 14
Answer: 26
Step-by-step explanation:
Lost 12, left with 14.
Let W be water balloons before the trip.
w - 12 = 14
14 + 12 = 26
Proof:
26 - 12 = 14
Look at this table:
England
Wules
Birth rate per 1000 population
1961
1994
17.6
17.0
12.2
(a) In England, from 1961 to 1994, the birth rate fell by 26.1%
What was the birth rate in England in 1994? Show your working.
(b) In Wales, the birth rate also fell.
Calculate the percentage fall from 1961 to 1994. Show your working.
The birth rate in England in 1994 is 13 and the percentage fall in Wales is 28.23%
(a)In England, from 1961 to 1994, the birth rate fell by 26.1%
We need to find the birth rate in England in 1994
Birth rate in 1961 is 17.6
Birth rate in 1994 = 17.6 - 17.6 x26.1/100
= 17.6 - 17.6 x261/1000
= 17.6 - 4.6
= 13
(b) In Wales, the birth rate also fell.
The birth rate in 1961 is 17.0
The birth rate in 1994 is 12.2
Percentage fall is 100 x (17.0 - 12.2)/17.0
Percentage fall is 28.23 %
Therefore, the birth rate in England in 1994 is 13 and the percentage fall in Wales is 28.23%
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Write a linear function in witch f(3)=-4 and f(1)=2
The linear function is y = -3x -5 with f(3)=-4 and f(1)=2.
Define linear function.The term "linear function" in mathematics applies to two different but related ideas: A polynomial function of degree zero or one that has a straight line as its graph is referred to as a linear function in calculus and related fields. The graph of a linear function is a straight line. The following is the form of a linear function. a + bx = y = f(x). One independent variable and one dependent variable make up a linear function. Any function with the formula f(x) = mx + b—where m and b are constants—is said to be linear. Because the graphs of these functions are lines in the plane, we refer to them as linear.
Given Data
f(3) = -4
f(1) = 2
The ordered pairs are (3,-4) and (1,2)
The equation of the line :
y - y₁ = [tex]\frac{y_{2} - y_{1} }{x_{2} -x_{1} }[/tex](x - x₁)
y + 4 = [tex]\frac{2+4}{1-3}[/tex] (x-3)
y + 4 = -3(x -3)
y + 4 = -3x + 9
3x + y = -5
y = -3x -5
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What angle does a 3.8 m ladder make with the ground if it reaches 2.1 m up the wall? How far is the foot of the ladder from the wall? (Give your answers to the nearest degree and the 1 decimal place of the metre.)
Answer:
here is the answer hop it helps mark me the brainliest
Solve the equation b over 27 equals negative 3 for b.
81
9
−9
−81
Solve the equation 42 = v + 35 for v.
−77
77
−7
7
Solve the equation −128 = 4x for x.
−124
132
−32
32
The solution of the equation is as follows;
b = -81v = 7x = -32How to solve equations?An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
In other words, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
The expression can be solved as follows:
b / 27 = - 3
cross multiply
b = -3 × 27
b = - 81
42 = v + 35
subtract 35 from both sides of the equations.
42 - 35 = v + 35 - 35
v = 42 - 35
v = 7
- 128 = 4x
divide both sides of the equations by 4
4x / 4 = - 128 / 4
x = - 32
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Answer:
b = -81v = 7 x = -32Step-by-step explanation:
1) b/27 = -3, then b = ?
→ b/27 = -3
→ b = -3 × 27
→ [ b = -81 ]
Thus, value of b is -81.
2) 42 = v + 35, then v = ?
→ v + 35 = 42
→ v = 42 - 35
→ [ v = 7 ]
Thus, value of v is 7.
3) -128 = 4x, then x = ?
→ 4x = -128
→ x = -128/4
→ [ x = -32 ]
Thus, value of x is -32.
Question is in the image. I need help with #19
EXPLANATION
Replacing the given functions into the following:
[tex]\frac{f(x+h)-f(x)}{h}[/tex][tex]\frac{x^2-1+h-(x^2-1)}{h}[/tex]Removing the parentheses and simplifying:
[tex]\frac{x^2-1+h-x^2+1}{h}[/tex]Simplifying like terms:
[tex]\frac{h}{h}=1[/tex]Hence,
[tex]\frac{f(x+h)-f(x)}{h}=1[/tex]in 15 of the 100 trials of the simulation none of the 10 passengers chosen was seated in first class. does this result provide convincing evidence that the tsa officers did not carrry out a truly random samplw?
The result provides convincing evidence that the tsa officers did not carrry out a truly random sample.
What is a random sample?A simple random sample is a subset of a statistical population in which each member has an equal chance of being selected.
In statistics, a simple random sample is a subset of individuals picked at random from a larger set, with all individuals having the same probability. It is the process of selecting a sample at random.
In this case, it's important to note that the fact that all the people chosen were first class members means that it was bias and not a random sampling.
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Solve the following equation for y, simplifying all fractions: 6x + 10y = - 80 a) y = 3 X - 8 5 3 X 8 b) y alw c) y -x + 8 w л | о л | d) y = x – 8
Solving a linear equation with 2 variables
First isolate y term
10 y = -6x - 80
Now divide by 10
y = (-6/10)x -(80/10)
y = (-3/5)x - 8
what is the slope of the line represented by the equation 4/5x -3
The slope of the line represented by the equation; 4/5x - 3 is; 4/5.
What is the slope of the line represented by the equation 4/5x - 3?It follows from the task content that the slope of the line represented by the equation; (4/5)x - 3 is to be determined.
Recall, from line geometry and equation of lines;
The slope-intercept form of the equation of a line, y is given as; y = mx + c.
Where, m is the slope and c is the y-intercept.
Therefore, by comparison of the equation defined as; 4/5x - 3; it follows that the slope of the equation is; 4/5.
Ultimately, the required slope is; 4/5.
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Write an equation of the line passing through the point (2, -9) that is perpendicular to the line V=x+6.
The equation of the line that is perpendicular to y = x + 6 is expressed as: y = -x - 7
How to Write the Equation of a Line?The equation of a line can be written as y = mx + 1. The value of m is the slope while the value of b is the y-intercept.
The slopes of two lines that are perpendicular to each other are negative reciprocals. This means, if we multiply their slope values together, we will get -1.
Given the line, y = x + 6, the slope of the line is 1. The slope of the line it is perpendicular to is -1, because -1 is the negative reciprocal of 1.
Substitute m = -1 and (x, y) = (2, -9) onto y = mx + b to find the value of b:
-9 = -1(2) + b
-9 = -2 + b
-9 + 2 = b
-7 = b
b = -7
To write the equation of the perpendicular line, substitute m = -1 and b = -7 into y = mx + b:
y = -x - 7
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Determine the intervals on which the function is increasing, decreasing, and constant.
A) Increasing on (- 5, - 3) and (2, 5) Decreasing on (- 3, 0) Constant on (0, 2) B) Increasing on (- 3, - 1) Decreasing on (- 5, - 2) and (2, 4) Constant on (- 1, 2) C) Increasing on (- 3, 1) ; Decreasing on (- 5, - 3) and (0, 5) ; Constant on (1, 2) D ) Increasing on (- 3, 0) Decreasing on (- 5, - 3) and (2, 5); Constant on (0, 2)
The intervals on which the function is increasing, decreasing and constant are (-5,-3) and (2,5) on increasing (-3,0) on decreasing and (0,2) on constant.
What is intervals?
An interval in math is the measured in terms of the numbers. An interval to includes all the numbers that come between two of particular numbers. This is the range includes all of the realistic numbers between those two of numbers. Real numbers are the any kind of number you can definitely think of.
Sol-by showing in the figure the function is increasing on the (-3,0)
Decreasing on (-5,-3) and (2,5)
Constant on (0,2)
Thus, the correct option is A
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exercise 2.31. suppose a family has 2 children of different ages. we assume that all combinations of boys and girls are equally likely. (a) formulate precisely the sample space and probability measure that describes the genders of the two children in the order in which they are born. (b) suppose we learn that there is a girl in the family. (precisely: we learn that there is at least one girl.) what is the probability that the other child is a boy? (c) suppose we see the parents with a girl, and the parents tell us that this is their youngest child. what is the probability that the older child we have not yet seen is a boy?
A. P(BB) = P( GG) ,P(BG), P(GB) .1/4 the sample space and probability measure that describes the genders of the two children in the order in which they are born.
B. = 1/2 is the probability that the other child is a boy.
C. 1/2 is the probability that the older child we have not yet seen is a boy.
A. sample space s. {BB,GG,BG,GB}
P(BB) = P( GG) ,P(BG), P(GB) .1/4
B. P(other child is boy / at least one girl
therefore P(A/B) = P(A∩B)/P(B) ( Additional probe)
P(B) = P (at least one girl)
= P (GG)+P(BG)+P(GB)
= 1/4+1/4+1/4
= 3/4
P (A∩B) = P (One boy and one girl)
= P (BG)+P(GB)
= 1/4+ 1/4
= 1/2
Therefore, P(A/B) = [tex]\frac{\frac{1}{2} }{\frac{3}{4} }[/tex] = 2/3
C. P (older child is a boy/ younger child is a girl)
P [tex]\frac{older child\ is a\ boy}{youngerchild is a girl}[/tex]
P(BG)/P (BG)+ P (GG) = 1/4/1/4+1/4 = 1/2
What is probability?Probability refers to potential. A random event's occurrence is the subject of this area of mathematics. The range of the value is 0 to 1. Mathematics has incorporated probability to forecast the likelihood of various events. The degree to which something is likely to happen is basically what probability means. You will understand the potential outcomes for a random experiment using this fundamental theory of probability, which is also applied to the probability distribution. Knowing the total number of outcomes is necessary before we can calculate the likelihood that a specific event will occur.
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(3x(2)+4x+2)-(7x(2)+2x+5)
how do we solve it please someone help
The simplified form of the expression [tex](3x^2+4x+2)-(7x^2+2x+5)[/tex] is [tex]-4x^2+2x-3[/tex].
In the given question,
The given expression is [tex](3x^2+4x+2)-(7x^2+2x+5)[/tex].
We have to solve the given expression.
To solve this question we use have to follow some rule.
Some Rules are
We have to remove parentheses from each side of the equation and combine similar phrases to make it simpler. To separate the variable term on one side of the equation, use addition or subtraction.To find the variable, use division or multiplication.In this given question to solve the expression we firstly solve the bracket.
When we multiply the term under the bracket with minus sign then all sign under the bracket will also be changed
Now simplifying the expression.
[tex]=3x^2+4x+2-7x^2-2x-5[/tex]
Now we combine the similar term.
[tex]=(3x^2-7x^2)+(4x-2x)+(2-5)[/tex]
[tex]=-4x^2+2x-3[/tex]
Hence, the simplified form of the expression [tex](3x^2+4x+2)-(7x^2+2x+5)[/tex] is [tex]-4x^2+2x-3[/tex].
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Write the equation of the line that is perpendicular to the line y=3x+5 and passes through point (9,5)
The equation of the required perpendicular line is x + 3y = 24.
What is the slope relation for two perpendicular lines?
For two perpendicular lines on a plane, the product of their slopes always equals (-1).
What is the equation of line with slope 'm' and passing through the point (x₁, y₁)?
The standard equation of the line with slope 'm' and passing through the point (x₁, y₁) is y - y₁ = m(x - x₁).
Given, the required line is perpendicular to line given by y = 3x + 5 with slope, m₁ as 3, on analysis with standard equation of line; also the line passes through the point (9, 5) i.e. (x₁, y₁).
Let the slope of the required line be = m₂
As per statement established in the literature above, we have:
Slope of two perpendicular lines = -1
∴m₁ × m₂ = -1 ⇒ 3m₂ = -1 ⇒ m₂ = (-1)/3
Again, equation of the required perpendicular line is:
y - 5 = [(-1)/3][x - 9] ⇒ 3y - 15 = 9 - x ⇒ x + 3y = 24
Thus, the equation of the required perpendicular line is x + 3y = 24.
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determine the equation of line from the graph
Answer:
y=2x+0
Step-by-step explanation:
This is slope intercept form. The slope is 2 you can tell by the two points on the graph at (0,0) and (1,2). The points move up 2 and over 1. That makes the slope 2/1 but since the bottom half is just a one it can be simplified to 2.
And the +0 just means that its y intercept is 0,0
however it is not required to put +0 at the end
Answer:y=2x+0
Step-by-step explanation:
Seth buys last year's best-selling novel, in hardcover, for $21.75. This is with a 25% discount from the original price. What was the original price of the novel?
Price after the 25% discount: $21.75
This means that $21.75 is 75% of the original price. If x is the original price, then:
[tex]\begin{gathered} 75\text{\% of }x=21.75 \\ \frac{75}{100}\cdot x=21.75 \\ x=\frac{100\cdot21.75}{75} \\ \Rightarrow x=\text{ \$}29 \end{gathered}[/tex]Can someone help me out (I will give branliest)
Answer: Emma > Amelia > Brandon > Celesle > Damian
Step-by-step explanation:
We convert all the fractions to decimals (2 decimals).
Amelia 4.35 lbs
Brandon [tex]4\frac{1}{3}= \frac{12}{3} +\frac{1}{3} =\frac{13}{3}[/tex] ≈ 4.33 lbs
Celesle 4.2 lbs
Damian √15 ≈ 3.87 lbs
Emma [tex]4\frac{2}{3} =\frac{12}{3} +\frac{2}{3} =\frac{14}{3}[/tex] ≈ 4.67 lbs
4.47 lbs > 4.35 lbs > 4.33 lbs > 4.2 lbs > 3.87 lbs
Emma > Amelia > Brandon > Celesle > Damian
