Which expression is equivalent to 4 - (-7)
a 7 + 4
b 4 - 7
c - 7 - 4
d - 4 +7

  A.  7 + 4

Step-by-step explanation:

The opposite of a negative number is a positive number with the same magnitude. That is, -(-7) = +7.

So, the expression simplifies to ...

  4 + 7

That is equivalent to ...

  7 + 4 . . . . . . matches choice A

c. 4 and 1/2 pounds is the answer! : )

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: