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photoshop1234 [79]
3 years ago
7

A car advertisement states that a certain car can accelerate from rest to 70 m/s in 7 seconds. Find the car's average accelerati

on. ​
Mathematics
1 answer:
Contact [7]3 years ago
5 0

Answer:

The average acceleration of the car will be 10 m/s.

Step-by-step explanation:

70 / 7 = 10 m/s.

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Suppose you receive an allowance of $55 and your friend receives an allowance of $40 at the beginning of the month. If you spend
Licemer1 [7]

Answer: 5 days

Step-by-step explanation:

so we need to find:

55 - 6a = 40 - 3a

with a being the days we need to find

-40 on each side

15 - 6a = -3a

+6a on each side

15 = 3a

divide each side by 3

5 = a

4 0
2 years ago
A submarine 625 feet below sea level ascends (rises up) 575 feet before descending (submerging down) another 455 feet. Describe
blagie [28]

Answer:

505ft below the surface

Step-by-step explanation:

subtract 575 from 625 and then add 455 to get your final answer.

4 0
3 years ago
428 students were surveyed about their preferences of sports. 146 students like football, 144 students like baseball, and 45 stu
ella [17]

This is what we already know:


\left[\begin{array}{cccc} &YB&NB&total\\YF&45&[unknown]&146\\NF&[unknown]&[unknown]&[unknown]\\total&144&[unknown]&428\end{array}\right]


And using this information, we can fill the table out. Remember that everything must add up to the total in the column and row. The complete table looks like this:


\left[\begin{array}{cccc} &YB&NB&total\\YF&45&101&146\\NF&99&183&282\\total&144&284&428\end{array}\right]


Using the complete table, we see the fraction for students that only like baseball is \frac{99}{428} and students who only like football is \frac{101}{428} . All you need to do is add these fractions together to get your answer.


\frac{99}{428} +\frac{101}{428} =\frac{200}{428}


In short, 200 students only like one of the two sports.

3 0
3 years ago
Write the equation of the line that passes through the point (-8,-3) with : slope of -1/4
viktelen [127]

Answer:

In slope-intercept form:

y =  -  \frac{1}{4} x - 5

In standard form:

x + 4y =  - 20

Step-by-step explanation:

- 3 =  -  \frac{1}{4}  ( - 8) + b

- 3 = 2 + b

b =  - 5

y =  -  \frac{1}{4} x - 5

- 4y = x + 20

- x  - 4y = 20

x + 4y =  - 20

8 0
1 year ago
Find the sum. <br> ( - x - 2y - 4z ) + ( 7x - 6y - 6z )
Makovka662 [10]
( - x - 2y - 4z ) + ( 7x - 6y - 6z ) =\\&#10;-x-2y-4z+7x-6y-6z=\\&#10;6x-8y-10z
6 0
3 years ago
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