Simplify the expression: 7 - 7(5 + x) - 9x

-16x - 28

Step-by-step explanation:

We have 7 - 7 * (5 + x) - 9x.

First, we take care of the parentheses, which means we need to expand it out. Remember that in expanding out parentheses, we multiply the outside number (-7 in this case) by each of the inside terms (5 and x) and add those together:

-7 * (5 + x) = -7 * 5 + -7 * x = -35 - 7x

Put this back into the original equation:

7 + -35 - 7x - 9x = -16x - 28

Thus, our simplification is -16x - 28.

~ an aesthetics lover

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.