Answer:
x=9
Step-by-step explanation:
x = 3^2
x = 3*3
x=9
Idk how to do this I forgot
Hi there
Part a
49.98−49.98×0.5
=24.99
Part b
49.98−10
=39.98
Hope it helps
Answer:
8
Step-by-step explanation:
x+x+7=23
2x=16
x=8
Answer:
x² + y² = 85
Step-by-step explanation:
Using the expansion
(x - y)² = x² + y² - 2xy , then
x² + y² - 2xy = (x - y)² ( add 2xy to both sides )
x² + y² = (x - y)² + 2xy ← substitute given values
= 9² + 2(2)
= 81 + 4
= 85
