The answer is A. because for you to find the answer you have to subtract so it would be 55.75-12.5=43.25

Substitute x = 2 into y = - 6x + 9

Answer : x = 2, y = - 3
Hope this helps. - M
Step-by-step explanation:
1. x² = V12²+16²
= V144+256
= V400
x² = 20
2. x² = V14²-11²
= V196-121
= V75
x = V25×3
= 5V3
3. x² = V9²-7²
= V81-49
= V32
x = V16×2
= 4V2
When dividing exponents you subtract the exponents. When multiplying you add them. When raising an exponent by an exponent you multiply them.<span />