Answer:
A pair of inverse operations is defined as two operations that will be performed on a number or. variable, that always results in the original number or variable. Another way to think of this is. that the two inverse operations “undo” each other.
Step-by-step explanation:
for example addition and subtraction are and divison and multiplication are, because they inverse each other.
The problem is stating that Mandy found the ratio between input and output of many points on the graph, which are displayed by the fractions. Mandy's conclusion was that they were not equivalent, meaning they were different and that is why the function is not proportional. Mandy's conclusion is wrong, the relation is proportional. If we take all the functions we have:

Where the input is the denominator and the output is the numerator we will have a ratio of "5". Mandy's mistake was to invert the last fraction, she inserted the output in the denominator, this is why she said the were different.
They will be 12 miles apart a 2:30 pm, Trevor runs at a speed of 5 miles per hour, which they both start at noon which means, roughly in 12 miles it will be 2:30pm.
Answer:
4
Step-by-step explanation:
9:8 = 4x+2:4x
36x = 32x + 16
x = 4
First input 6x for y in the top equation

simplify

divide both sides by -14

simplify


simplify

check

simplify

x=-1 y=-6
(-1, -6)