7. a. To solve x2 + 7x = 0, Mai rewrote the equation as x(x + 7) = 0. Explain how
rewriting this equation in factored form enables Mai to solve the equation.

x = 25/2304

step-by-step explanation:

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation:

the answer is 40.

proof: