Question

Please help and explain i’m really slow and i’m confused.

Answer 1

For part a:

8 - (?) = 18

We need to find a number that subtracted from 8 gives us 18. That's number is -10, because:

8 - ( - 10) = 8 + 10 = 18

For part b:

$\frac{-21}{?}=-7$

We need to find a number such that -21 divided by that number is equal to -7, So, the missing number is 3, because:

$\frac{-21}{3}=-7$

For part c:

16 + ? = -36

We need to find a number that added to 16 give as -36. The missing number is -52, because:

16 + (- 52) = 16 - 52 = -36

For part d:

-6(?) = 66

We need to find a number that multiplies by -6 give us 66, that number is -11, because:

-6*(-11) = 66

For last part:

(?)^2=25

We need to find a number that to the power of 2 is equal to 25. The possible numbers are 5 and -5 because:

$\begin{gathered} 5^2=5\cdot5=25 \\ (-5)^2=(-5)\cdot(-5)=25 \end{gathered}$

Answers: a. 18

b. 3

c. -52

d. -11

e. 5 and -5