Answer: x = -3
Step-by-step explanation:
42=-7(x - 3)
-7(x - 3) = 42
-7(x - 3)/-7 = 42/-7
x - 3 = -6
x - 3 + 3 = -6 + 3
x = -3
A store sells a laptop for $1,137.84. This is after a markup of 32% has been applied to the original price the store paid for the laptop.
Which equations will help find the original price of the laptop, x?
The equations that can be used to determine the original price of the laptop are p (1 + 0.32) = $1,137.84 and $1,137.84 = 1.035p
What is mark up?Markup is when the price of an item is increased by a certain percentage. The cost of the laptop was increased by 32%.
What is the equation that can be used to determine the original price?The price of the laptop after the increase = p(1 + percentage increase)
p (1 + 0.32) = $1,137.84
$1,137.84 = 1.035p
To learn more about mathematical equations, please check: https://brainly.com/question/26427570
How do you write this number using words?
44,038
Answer:
forty four thousand thirty eight
Step-by-step explanation:
Answer:
forty four thousand thirty eight
Step-by-step explanation:
combine the words for the number place + digits.
hope this helps!
4X=80 question in assignment
Algebra 2
I need help with this worksheet and if you can explain your answers because I don’t know this topic yet. And only answer my question if you have a realistic answer
Answer:
1-) 2-) 3-)
VA = -3 VA = -2 VA = -1, 1
HA = 1 HA = 0 HA = 0
Im not exactly sure how to do the tables or find the Domain I had a bit of trouble with the math part on that one, Hope this Helps though!
Which equation represents the perpendicular
bisector of AB whose endpoints are A(8.2) and
B(0,6)?
1: y = 2x - 4
2: y=-1/2x+2
3: y=-1/2x+6
4: y = 2x - 12
Answer:
1: y = 2x -4
Step-by-step explanation:
The perpendicular bisector of the given segment is the line through its midpoint that has a slope that is the opposite reciprocal of the segment's slope.
SlopeThe slope of the given segment can be found using the slope formula:
m = (y2 -y1)/(x2 -x1)
m = (6 -2)/(0 -8) = 4/-8 = -1/2
The opposite reciprocal of this is ...
m' = -1/(-1/2) = 2 . . . . (eliminates answer choices 2 and 3)
__
PointThe midpoint of the given segment is ...
(A+B)/2 = (8 +0, 2 +6)/2 = (4, 4)
__
Y-interceptThe y-intercept of the perpendicular bisector can be found from ...
b = y -mx
b = 4 -(2)(4) = -4
Then the equation of the perpendicular bisector is ...
y = 2x -4
Help with math. Pic below please and thank you!
Answer:
C) 0.2
Step-by-step explanation:
please mark brainliest
My daughter, Lena is counting her blocks by color.
Red: 24
Blue: 12
Yellow: 8
Green: 16
Purple: 20
1. What is the ratio of red to yellow blocks?
2. What is the ratio of green to blue blocks?
3. What is the ratio of purple to total blocks?
simplify to get them right
Answer:
The ratio of red to yellow blocks = 24:8 = 3:1
The ratio of green to blue blocks = 16:12 = 4:3
The ratio of purple to total blocks = 20:60 = 1:3
Step-by-step explanation:
(would appreciate it if you could mark me the brainliest:))
HELP FAST!!
a person on a boat looks up at the top of a lighthouse and calculates the angle of elevation to be 27°. if the lighthouse is 108 ft tall, how far is the boat from the base of the lighthouse?
For a one-sample test for a population proportion p and sample size n, why is it necessary that np0 and n(1−p0) are both at least 10 ?.
The sample size must be large enough to support an assumption that the sampling distribution of the sample proportion is approximately normal. Therefore, the correct answer is option is C.
In order to use the normal approximation, we consider both np and n( 1 - p ). If both of these numbers are greater than or equal to 10, then we are justified in using the normal approximation.
While conducting a one-sample test, the population proportion is taken as p and the given sample size is n.
For the sample data to be used for the normal approximation
n×p≥10 and
n(1-p)≥10
Condition should be met.
That means when the np and n(1-p) value is greater than 10, the entire sample can be said to behave like a normal distribution.
This can be regarded as a general rule of thumb, and typically the larger the values of np and n(1-p), the better is the approximation.
Therefore, the correct answer is option is C.
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"Your question is incomplete, probably the complete question/missing part is:"
For a one-sample test for a population proportion p and sample size n, why is it necessary that np0 and n(1-p0) are both at least 10?
A) The sample size must be large enough to support an assumption that the distribution of the population is approximately normal.
B) The sample size must be large enough to support an assumption that the distribution of the sample is approximately normal.
C) The sample size must be large enough to support an assumption that the sampling distribution of the sample proportion is approximately normal.
D) The sample size must be large enough to support an assumption that the observations are independent.
E) The sample size must be large enough to support an assumption that the sample proportion is an unbiased estimator of the population proportion.
To rent a certain meeting room, a college charges a reservation fee of $16 and an additional fee of $6 per hour. The chemistry club wants to spend less than $82 on renting the room. What are the possible numbers of hours the chemistry club could rent the meeting room?
Answer:
10 hours
Step-by-step explanation:
For about 10 hours.
6 times 10 = 60
60+16= 76
At the Planetarium, tickets cost $9 for adults and $7 for kids under 12. What would be the total cost for 2 adult tickets and 16 kids tickets? What would be the total cost for aa adult tickets and kk kids tickets?
$9 adults
$7 kids
9×2=18 ($) parents/adults
16×7=112 ($) kids
I don't understand the last question
Answer:
126 sir :3
Step-by-step explanation:
All of the following are changes that occur in the body during exercise EXCEPT:
A. Blood pressure decreases
B. Breathing rate increases
C. Arteries supplying the muscles dilate.
D. Heart rate increases
x : 0,3=5:6 in its simplest form
Answer:
x:0.3=5:6-->x/0.3=5/6-->6×x=0.3×5-->6x=1.5-->x=1.5/6-->x=0.25Answer..
I need help please quickly
An ice cream cone has a diameter of 7 cm and a height of 13 cm. If you
have 2600 cubic centimeters of ice cream, what is the maximum number
of cones that you could completely fill?
Suzanna wants to measure a board, but she doesn't have a ruler to measure it. However, she does have several copies of a book she knows is 17 centimeters tall.
A: Suzanna lays the books end to end and finds that the board is the same length as 21 books. How many centimeters long is the board?
B: Suzanna needs a board that is at least 3.5 meters long. Is the board long enough? Explain.
Every book is 17 centimeters tall/long.
A : If the board is the same length as 21 books, its length is 17 x 21 = 357 centimeters.
B : 357 centimeters = 3.57 meters
Since 3.57 > 3.5, the board is long enough.
A store pays $307 for a refrigerator. The store marks up the price by 38%. What is the
amount of the mark-up?
Round your answer to the nearest dollar
Answer:
Since the $307 is the buying price of the store which makes it 100%. The store needs to make a profit from the refrigerator so it adds a +38% on the refrigerator making it a value of 138% of $307 which is 138/100 * $307 =$423.66 but we need it to the nearest dollar which will be rounded of to $424 since it passed the .5 mark
Step-by-step explanation:
Suppose that 12 inches of wire costs 36 cents.
At the same rate, how much (in cents) will 42 inches of wire cost?
Answer:
126 cents, or $1.26
Step-by-step explanation:
First you divide 42 by 12 and get 3.5, then you multiply that by 36 and get you answer.
On what interval is the function decreasing?
Answer:
[2, 5]
Step-by-step explanation:
it decreases where x is 2 and it end at where x is 5
btw [ ] these mean that they include the x (i think)
while ( ) these mean that they dont include the x, like idrk how to explain it D: but thats my best explanation
-4x+3<9 help please and show your answer
Answer:
X =1,5
Step-by-step explanation:
==>-4x+3<9
==>-4x<9-3
==>-4x<6.
==>[tex]x = \frac{6}{4} [/tex]
==>x =1.5
After stepping into a room with unusual lighting, Ellen's pupil has a diameter of 2 millimeters.
What is the pupil's area?
Use 3. 14 for.
Yoko's penny bank is 2/5 full. After she adds 320 pennies, it is 2/3 full. How many pennies can Yoko's bank hold?
Answer: 1200 pennies
Step-by-step explanation:
Let x be the number of pennies Yoko's bank can hold.
We can set up an equation representing the information given.
[tex]\frac{2x}{5} + 320 = \frac{2x}{3}[/tex]
We can multiply both sides by 15:
6x + 4800 = 10x
Combine like terms:
4x = 4800
Divide both sides by 4:
x = 1200
Answer:
12/15
Step-by-step explanation:
Tell whether the angles are adjacent, vertical, complementary, or supplementary. Then find the value of x
x=70 vertical opposite
Answer:
Vertical Angles
x = 70 °
Step-by-step explanation:
Vertical angles are a pair of opposite angles formed by intersecting lines.
since one sides is 70 ° that means the other side is the same.
Therefore x = 70°
[RevyBreeze]
How would I do this?
Answer:
Step-by-step explanation:
A triangle's angles have to equal to 180 degrees , so option B is not a triangle because it equals to 175
Answer:
A. Triangle? Yes. How do I know? Triangles add up to 180 degrees, and the angles measures add up to 180.
B. Triangle? No. How do I know? The angle measures only add up to 175 degrees, so it can’t be a triangle.
C. Triangle? Yes. How do I know? A triangle = 180 degrees and the angle measures add up to 180.
Find the distance between: (2, -9) (-1,4)
Answer: The distance between the points in exact form is
√178 and the decimal form is 13.34166406...
Jerliyn picked 40 apples in5 minutes What is the unit rate
Answer:
8
Step-by-step explanation:
40 divide by 5 is 8 x=8
Answer:
Step-by-step explanation:
The total of apples: Total apples = 40
The time: Time = 5 min
Unit rate = 40 ÷ 5 = 8 apples per min
Yeah can someone explain this to me
Answer: 75° is the smallest amount you need to rotate the image for it to look the same.
Step-by-step explanation: I hope it can be correct :))
I need help with Rational Functions
Answer: (5a+b)/2
Step-by-step explanation:
1. First factor 5a^2+36ab+7b^2
=(5a+b)(a+7b)
2. Factor 2a+14b
The two can be factored out, making the equation equal to 2(a+7b).
The factored out equation is now [tex]\frac{(5a+b)(a+7b)}{2(a+7b)}[/tex]
Since there is an (a+7b) on both sides of the fraction, they cancel out. You are left with (5a+b)/2. This fraction cannot be simplified more.
To verify you can multiply (5a+b)/2 times (2a+14b). If it is correct, it should come back out as 5a^2 + 36ab +7b^2
Using synthetic division, what is the quotient (2x3 − 3x − 10) ÷ (x − 2)?
Answer:
(2x3 − 3x − 10) ÷ (x − 2) = ( x-2)
Step-by-step explanation:
Answer:
2x^2 + 4x + 5
PLEASE HELP!!!!
When using the Desmos graphing calculator to find the least-squares regression line for the data below, what do you type in as the expression to generate the parameters and statistics?
x subscript 2 baseline y subscript 2 baseline
1 2
2 9
3 7
4 12
y subscript 2 baseline tilde m x subscript 2 baseline plus b
y subscript 2 baseline equals m x subscript 2 baseline plus b
y tilde m x plus b
y = mx + b
Given: The Table of Values
To Find: The least-squares regression line for the data set in the table by using the desmos graphing calculator.
SolutionThe general form of least-squares regression line is: y = mx + b Where, m is the slope and b is the y-intercept.
Where, m is the slope and b is the y-intercept.By using the desmos graphing calculator, we get
m 2.55 b -6.435 Substitute these Values
y = (2.55)x + (-6.435)
y = 2.55x - 6.435
Answer: A
The expression to generate the parameters and statistics is y tilde m x plus b, the correct option is C.
What is an expression?Expression in mathematics is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
We are given that;
x subscript 2 baseline y subscript 2 baseline;
1 2
2 9
3 7
4 12
Now,
To find the least-squares regression line for a data set using Desmos, you need to follow these steps:
Enter the data as a table in Desmos. For example, type {1, 2, 3, 4} in the x column and {2, 9, 7, 12} in the y column.
Type y tilde m x plus b in the expression box. This tells Desmos to find the values of m and b that minimize the sum of squared errors between y and y tilde (the predicted values).
Click on the wrench icon next to the expression to see the parameters and statistics. You should see something like this:
m = 2.8 b = -1.6 r² = 0.84
This means that the equation of the least-squares regression line is:
y tilde = 2.8 x - 1.6
And that the coefficient of determination (r²) is 0.84.
Therefore, by expression the answer will be y tilde m x plus b.
To know more about an expression follow;
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