B is the valid use of the associative property of addition
Answer:
1 - 2√7
Step-by-step explanation:
( 4 + √7)(2 - √7)
Open the brackets with
( 4+ √7)
= 4( 2 - √7) + √7(2 - √7)
= 8 - 4√7 + 2√7 - √49
= 8 ( -4 + 2)√7 - √49
= 8 - 2√7 - 7
= 8 - 7 - 2√7
= 1 - 2√7
Answer:
6x-30
Step-by-step explanation:
expand the brackets
6×x
6×-5
Answer:
D
Step-by-step explanation:
The equation given gives y in terms of x, where y is Shaun's savings and x is the number of months.
<em>We want to know the amount he will save in 25 months, so we can plug in x = 25 into the equation and get a value of y, that is the amount he will save. So:</em>

D is the correct answer.