C. -64x9 because you have to times the number
Answer:
0.125
Step-by-step explanation:
Answer:
x = 1, y = 3
Step-by-step explanation:
x = y - 2, so y = 4 (y - 2) -1
solve normally now
y = 4 (y - 2) -1
y = 4y - 8 - 1 (distribute)
y = 4y - 9 (simplify)
+9 -y -y +9
9 = 3y
3 = y
y - 2 = x
(3) - 2 = x
x = 1
X+15=102
102-15=x
x=87
Please give me brainliest
This is a simple formula:(a-b)*(a+b)= a^2-b^2
And it goes like this for your example: (a-1)*(a+1)=a*a+a-a-1*1=a^2-1^2=a^2-1
