Question

A car company tested a sports car on a road with different inclines. The test driver tested the car by driving a distance of x miles on a flat road, (x2 + 3) miles downhill, and (x - 7) miles uphill. Which simplified expression is equivalent to the total distance, in miles, for which the car was tested?

Answer 1

@jim_thompson5910

Answer 2

help!!!

Answer 3

(x^2 + 3) + (x-7)

x^2 + 3 + x - 7

x^2 + x + (3 - 7)

???

Answer 4

x2 + 2x - 4?

Answer 5

x^2 + x - 4

not sure how you got the 2x

Answer 6

3x2 − 4

Answer 7

thats wat i ment to put :)

Answer 8

oh that's not correct either

it should be x^2 + x - 4

Answer 9

oh :( i tried thanks i only hav 2 more can u help me with them?

Answer 10

that's ok, just keep trying and don't give up

Answer 11

sure

Answer 12

Simplify the following expression: (x + 6y) - (3x – 10y). If the final answer is written in the form Ax + By, what is the value of A?

Answer 13

(x + 6y) - (3x – 10y)

x + 6y - 3x + 10y

(x - 3x) + (6y + 10y)

???

Answer 14

3+16y

Answer 15

3x

Answer 16

@jim_thompson5910

Answer 17

x - 3x = -2x

so the value of A is -2

Answer 18

okay 1 more

Answer 19

Simplify the following expression: (5x2 + 3x + 4) − (2x2 − 6x + 3). If the final answer is written in the form Ax2 + Bx + C, what is the value of B?

Answer 20

you can just focus on the x terms since that's all they want

3x - (-6x)

3x + 6x

??

Answer 21

9x

Answer 22

so B = 9