Step-by-step explanation:
hope you can understand
I know a would be 40ft for Rachael and 50ft for Clare but I’m not completely sure about b
As points, x-intercepts take the form

, so to find the intercepts we can set

and solve for

.

From the first equation alone, we already know that

is a solution, which means one intercept is

.
The second equation gives

so that the second intercept occurs at

.
So if

and

, we have

, giving C as the answer.
we know that
the speed's formula is equal to

in this problem we have

Substitute the values in the formula


therefore
<u>the answer is</u>

105.0, 105%.
If one question is bonus, there are technically 20 questions on the test; 100/20 is 5, so each question is worth 5 points. 105 is 105% of 100.