Answer:
A. pen 0.75, pencil 0.50
Step-by-step explanation:
there is 4 of each that means you have to multiply by 4so
0.75 × 4 = 3
0.50 × 4 = 2
add them up equal 5
Answer:
The correct option is A. Pen $0.75; pencil, $0.50
Factor the expression completely.
-18 + 42x
Answer:
factor the polynomial
6 (7x-3)
Step-by-step explanation:
[tex] - 18 + 42x \\ divide \: both \: sides \: by \: 6 \\ 2(7x -3)[/tex]
to ppl who are good at math, I need your help pls
I'm really bad at this T-T
Answer:
Solve using the supplement of the angles.
Step-by-step explanation:
For the first page, you should use the supplement of the angles. This means, on a straight line, you can subtract the known angle from 180 degrees to find the missing angle. The top angle, for example, will be 180 - 46 resulting in the interior angle being 134 degrees.
You can do this until you find all of the known interior angles, then using the sum of interior angles and the current known interior angles you can find the last known interior angle. If they are asking you to solve for an exterior angle, you can once again subtract the known interior angle from 180 degrees to find the exterior angle.
For the second page, you can refer to exterior angles again. Knowing that all exterior angles add to 360 degrees, and since we are given all of them, we can set the sum of the exterior angles to 360 degrees.
9x + 4x + (5x + 10) + (5x + 25) = 360
Simplify.
23x = 325.
Solve for x.
Write an exponential function in the form y=ab^x that goes through points (0, 20) and (7, 2560).
Answer:
[tex]y = 20\times 2^{x}[/tex].
Step-by-step explanation:
Let [tex]y = (a)\, (b)^{x}[/tex] denote this exponential function for some constant [tex]a[/tex] and [tex]b[/tex] ([tex]b > 0[/tex]) that need to be found.
Assume that the graph of the function [tex]y = (a)\, (b)^{x}[/tex] goes through the point [tex](x_{0},\, y_{0})[/tex]. Substituting in [tex]x = x_{0}[/tex] and [tex]y = y_{0}[/tex] should satisfy the equation of this function:
[tex]y_{0} = (a)\, (b)^{x_{0}}[/tex].
For example, [tex]y = (a)\, (b)^{x}[/tex] goes through the point [tex](0,\, 20)[/tex]. Substituting in [tex]x = 0[/tex] and [tex]y = 20[/tex] should then satisfy the equation of this function:
[tex]20 = (a)\, (b)^{0}[/tex].
Similarly, since the graph of this function goes through [tex](7,\, 2560)[/tex] where [tex]x = 7[/tex] and [tex]y = 2560[/tex]:
[tex]2560 = (a)\, (b)^{7}[/tex].
In general, the constant [tex]a[/tex] in such systems could be eliminating by dividing one equation by the other. For example, dividing [tex]2560 = (a)\, (b)^{7}[/tex] by [tex]20 = (a)\, (b)^{0}[/tex] gives:
[tex]\displaystyle \frac{2560}{20} = \frac{(a)\, (b)^{7}}{(a)\, (b)^{0}}[/tex].
Simplify to obtain:
[tex]\displaystyle 128 = b^{7 - 0}[/tex].
[tex]\displaystyle 128 = b^{7}[/tex].
[tex]b^{7} = 128[/tex].
Since the exponent of [tex]b[/tex] is an odd number, the sign of [tex]b[/tex] should also be positive- same as the sign of [tex]128[/tex]. Extra steps would be required if the exponent of [tex]b[/tex] is even.
Raise both sides to the [tex](1/7)[/tex]th power to find the (unique) value of [tex]b[/tex]:
[tex]b = 128^{1/7} = 2[/tex].
Substitute [tex]b = 2[/tex] back into either equation (for example, [tex]2560 = (a)\, (b)^{7}[/tex]) to find the value of [tex]a[/tex]:
[tex]2560 = (a)\, (2)^{7}[/tex].
[tex]\begin{aligned}a &= \frac{2560}{2^{7}} \\ &= \frac{2560}{128} \\ &= 20\end{aligned}[/tex].
Thus, this exponential function would be [tex]y = 20\times 2^{x}[/tex].
A number is randomly selected from {15, 16, 17, 18, 19, 20}. A is represented by the event that the number picked is less than or equal to 16. What is the probability of the complement of event A?.
The probability of the event that the number picked is less than or equal to 16 is 33.33%. Then the probability of the complement of event A is 66.67%.
What is probability?Probability means possibility. It deals with the occurrence of a random event. The value of probability can only be from 0 to 1. Its basic meaning is something is likely to happen. It is the ratio of the favorable event to the total number of events.
A number is randomly selected from {15, 16, 17, 18, 19, 20}.
A is represented by the event that the number picked is less than or equal to 16.
Total event = 6 {15, 16, 17, 18, 19, 20}
Favorable event = 2 {15, 16}
Then the probability of the event that the number picked is less than or equal to 16 will be
[tex]\rm P(x\leq 16) = \dfrac{2}{6}\\\\P(x\leq 16) = \dfrac{1}{3} \\\\P(x\leq 16) = 0.3333\\\\ P(x\leq 16) = 33.33 \ \%[/tex]
The probability of the complement of event A will be
[tex]\rm P(x > 16) = \dfrac{4}{6}\\\\P(x > 16) = \dfrac{2}{3} \\\\P(x > 16) = 0.6667\\\\ P(x > 16) = 66.67\ \%[/tex]
The probability of the complement of event A is 66.67%.
More about the probability link is given below.
https://brainly.com/question/795909
4x+2/2 in standard form
Answer:
Step-by-step explanation:
4x2−y2−24x+4y+28=0⇒(4x2−24x)−(y2−4y)+28=0
Please include a chart similar to the image below. Question is in the image below
Step-by-step explanation:
Given:
Total distance is 500 kmTotal time is 5 1/2 hThe distance travelled at 100 km/h is xThe distance travelled at 80 km/h is yWe know that:
Time = distance / speedConsidering all the info we can make below chart:
Nikolas' car trip
| at 100 km/h | at 80 km/h | Total |
Distance | x | y | 500 km |
Time | x/100 | y/80 | 5 1/2 h |
help please asap
Adult racehorse weights are normally distributed, with a mean of 500 kg and a standard deviation of 33 kg. Approximately what percentage of the adult racehorses weigh more than 570 kg?
1.7%
98.3%
93.3%
0.12%
Answer:
The percentage of the adult racehorses weigh more than 570 kg is 1.7% ⇒ 1st answer Step-by-step explanation: Adult racehorse weights are normally distributed, with a mean of 500 kg and a standard deviation of 33 kg We need to find the percentage of the adult racehorses weigh more than 570 kg To solve the problem do these steps 1. Find z-score 2. Use z-score to find the corresponding area which represented P(x) 3. Change P(x) to percentage ∵ z = (x - μ)/σ ∵ The mean μ = 500 kg ∵ The standard deviation σ = 33 kg ∵ x = 570 kg Substitute these values in the rule above ∴ z = Let us use the normal distribution table to find the corresponding area ∵ The area corresponding to z-score of 2.12 is 0.98300 ∵ We need x > 570 , then we need the area to the right of the z-score ∴ P(x > 570) = 1 - 0.98300 = 0.017 Change it to percentage by multiplying the answer by 100% ∴ The percentage of x > 570 = 0.017 × 100% = 1.7% The percentage of the adult racehorses weigh more than 570 kg is 1.7%
Step-by-step explanation:
The percentage of the adult racehorses weigh more than 570 kg is 1.7% ⇒ 1st answer Step-by-step explanation: Adult racehorse weights are normally distributed, with a mean of 500 kg and a standard deviation of 33 kg We need to find the percentage of the adult racehorses weigh more than 570 kg To solve the problem do these steps 1. Find z-score 2. Use z-score to find the corresponding area which represented P(x) 3. Change P(x) to percentage ∵ z = (x - μ)/σ ∵ The mean μ = 500 kg ∵ The standard deviation σ = 33 kg ∵ x = 570 kg Substitute these values in the rule above ∴ z = Let us use the normal distribution table to find the corresponding area ∵ The area corresponding to z-score of 2.12 is 0.98300 ∵ We need x > 570 , then we need the area to the right of the z-score ∴ P(x > 570) = 1 - 0.98300 = 0.017 Change it to percentage by multiplying the answer by 100% ∴ The percentage of x > 570 = 0.017 × 100% = 1.7% The percentage of the adult racehorses weigh more than 570 kg is 1.7%
PLEASE MARK AS BRAIN LISTAnswer:
yes it is correct good work
Alberto is painting a large triangle on one wall of his bedroom. The base of the triangle is 4 feet, and the height is 8 feet. It takes 0.2 quarts of paint to cover 1 square foot.
How many quarts of paint does Alberto use?
0.8 qt
1.6 qt
3.2 qt
6.4 qt
help me. I need help
[tex]17.00906 < 17.00936 < 17.00963 < 17.09360 < 17.09361[/tex]
Hope that helps!
How do i solve these?
Answer:
so is volume length times width
Using the rules of Order of Operations, determine which operation would come first in the following problem; division, addition, or subtraction.
8 - 6 ÷ 3 + 11 =
Answer:
6 divided by 3 would come first
Step-by-step explanation:
follow pemdas which stands for parenthesis, exponents, multiplication, division, adadditiaddition, then subtraction
anyone who answers gets brainliest:)
Answer:
3/5
Step-by-step explanation:
Answer:
[tex]\frac{3}{5}[/tex] would be your answer
Step-by-step explanation:
Since you have [tex]\frac{15}{25}[/tex] and the denominator for the answer is 5. You will be dividing 15 and 25 by 5. Making it look like:
15 ÷ 5 = 3
25 ÷ 5 = 5
so your answer will be
[tex]\frac{3}{5}[/tex]
How many degrees is 5/12?
Answer:
The answer is 22 point 62 degrees.
which equation represents a line that is parallel to the line whose equation is 2y=3x+7 ?
1) y=x+7
2) 2y=3x-3
3) y=2/3x-3
4) y=3/2x-3
A line with a slope of –9 passes through the point (1, –9) . What is its equation in slope -intercept form?
Step-by-step explanation:
we start with the point-slope form
y - y1 = a(x - x1)
where "a" is the slope, (x1, y1) is a point on the line, and then we simplify that equation giving us the slope-intercept form
y = ax + b
so,
y - -9 = -9(x - 1)
y + 9 = -9(x - 1)
and now simplifying this
y + 9 = -9x + 9
y = -9x
Which y-intercept is smaller?
-6, -2, 1, or 1 1/2
Answer:
-6
Step-by-step explanation:
if you put all on a number line negitive six is the furthest to the left. meaning its the lowest number
Answer:
Coordinates on a graph cannot be larger or smaller than each other. They are just locations. If you are asking which number has the lowest value, it would be the negative with the highest number. In this case, -6 is the smallest value.
Step-by-step explanation:
Please help, I am stuck on the question!
Answer:
C
Step-by-step explanation:
a linear equation has the form
y = ax + b
y = - [tex]\frac{6}{7}[/tex] x - 11 ← is in this form and is a linear equation
Answer:
C: Linear
Step-by-step explanation:
Linear equations are also called first-order equations. An equation in which the unknowns are all primary so, it’s linear.
Diego and Lin are drinking milkshakes. Lin starts with 12 ounces and drinks
per second. Diego starts with 20 ounces and drinks į an ounce per second.
1. How long will it take Lin and Diego to finish their milkshakes?
Answer:
Lin=48 seconds Diego=30 seconds
Step-by-step explanation:
Answer:
Lin 48 seconds Diego 30 seconds
Step-by-step explanation:
Lin ----- 48 seconds
Diego---------30 seconds
Lin ---------- 12 ounces ÷ (1/4) ounces/second = 12 ÷ (1/4) = 48 seconds
Diego --------- 20 ounces ÷ (2/3) ounces/second = 20 ÷ (2/3) = 30 seconds
1. Jenna measures all the angles around a point.
Her results are 23°, 145°, 23° and 69°
Explain why these results cannot be true.
Answer:
When we add 23°, 145°, 23° and 69° we get 260°
And 260° does not have defined number of sides
Step-by-step explanation:
These are the polygons with the number of sides and angles
Polygon Name | Number of Interior Angles | Sum of Interior Angles
Triangle 3 180°
Quadrilateral 4 360°
Pentagon 5 540°
Hexagon 6 720°
Septagon 7 900°
Octagon 8 1080°
Nonagon 9 1260°
Decagon 10 1440°
what are the coordinates of the hole in the graph of f(x)
Answer:
I think it might be this one
Can somebody help me please
Answer:
x = 7
Step-by-step explanation:
The 2 right triangles are similar by the AA postulate, then the ratios of corresponding sides are in proportion, that is
[tex]\frac{x}{4}[/tex] = [tex]\frac{3.5}{2}[/tex] ( cross- multiply )
2x = 14 ( divide both sides by 2 )
x = 7
Will recommend to see attached picture as name of angles are based on it.
[tex] \\ [/tex]
We can only find value of x if both triangles i.e triangle DOC and triangle AOB are similar.
[tex] \\ [/tex]
[tex]\sf \underline{In \: \triangle \: DOC \: and \: \triangle\:AOB: }[/tex]
[tex] \\ [/tex]
[tex] \sf1. \angle DOC = \angle AOB[/tex]
Reason :-
VOC (Vertically opposite angle)
How to recognize either it is VOC (Vertically opposite angle) or not?
So it's basically very easy to recognize, when ever u see lines intersect each other just like a multiply sign ( × ) either horizontal or parallel they are considered as VOC ans are always equal.
[tex] \\ [/tex]
[tex] \sf2. \angle CDO = \angle BAO[/tex]
Reason:-
Both are of 90°.
So how we recognized that these both angles were in 90°?
When ever you see that angle is marked in square ( □ ) like shape instead of curve shape then it means the angle is 90°.
[tex] \\ [/tex]
[tex]\sf\triangle \: DOC\simeq \triangle\:AOB: [/tex]
By :- AA (angle angle)
[tex] \\ \\ [/tex]
Now Finally Let's find value of x.
[tex] \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{DC}{AB} = \dfrac{OC}{OB} = \dfrac{OD}{OA} [/tex]
Reason :- Corresponding sides of similar triangle are in proportion.
[tex] \\ [/tex]
So:-
[tex] \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{DC}{AB} = \dfrac{OC}{OB}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{2}{3.5} = \dfrac{4}{x}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{3.5}{2} = \dfrac{x}{4}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{35}{2 \times 10} = \dfrac{x}{4}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{ \cancel{35}}{2 \times \cancel{10}} = \dfrac{x}{4}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{7}{2 \times 2} = \dfrac{x}{4}[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{4 \times 7}{2 \times 2} = x[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{ \cancel4 \times 7}{\cancel2 \times 2} = x[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{ 2 \times 7}{1 \times 2} = x[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{\cancel 2 \times 7}{1 \times \cancel2} = x[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{1 \times 7}{1 \times 1} = x[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf\dfrac{7}{1 } = x[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \sf7= x[/tex]
[tex] \\ \\ [/tex]
[tex] \dashrightarrow \bf x = 7[/tex]
[tex] \\ \\ [/tex]
.°. length of x is equal to 7(unit)
please quick as possible
Answer:
3
Step-by-step explanation:
6x (horizontal totals) + 12 x(vertical totals) = 54
18x = 54
x = 3
HOPE THIS HELPS!!!
Neil has 3 partially full cans of white paint. They contain 1/3 gallon, 1/5 gallon and 1/2 gallon of paint. About how much paint does Neil have in all
Answer:
31/30 or 1 1/30
Step-by-step explanation:
1/3+1/5+1/2
Any process that generates well-defined outcomes is:.
A rectangular park with dimensions of 1500feet by 2000 feet , has a diagonal path that goes from the top nearest corner to the bottom southwest , how long is the walking path
Answer:
Using Pythagorean theorem a2 + b2 = c2 15002 + 20002 = C2; c is 2,500 feet
Step-by-step explanation:PLEASE MARK AS BRAIN LISTlet F(x) = x^2 + ax + b when a and b are integers, if F(3+root5) = 0 then what is value of F(4) ? please
help me I don't know really!!!
Answer:
Step-by-step explanation:
Which situation can be represented by the equation x + 6 = 13 I will. Mark brainiest
Explanation:
6 = number of games the first friend won
x = number of games the other friend won
6+x = x+6 = total number of games
x+6 = 13 total games
Solving for x leads to x = 7
Please help!!! will mark brainliest
Help please!
enter the number that belongs in the green box as you solve for p
Please comment answer!
Answer:
18
Step-by-step explanation:
you take away -9 from both sides
27-9=18
Answer:
9
Step-by-step explanation:
so first you send +9 to the right , it will become -9
2p + 9 = 27
2p = 27 - 9
you substract -9 from 27
2p = 18
next step you send 2 to the other side... since it multiply on the left side...it will become divide on the right side, so that p can be alone
2×p = 18
p = 18 ÷2
p = 9
i rewrote it without explication
full step is : 2p = 27 - 9
2p = 18
p = 18 ÷ 2
p = 9
1, 4, 4, 4, 4, 6, 5 What is the IQR of the data?
a)1
b)1. 53
c)2
d)5