Answer:
8 1/4
Step-by-step explanation:
8+(7+1)2 ÷ 4 · (1/2)^4
8+16 / 4 · 1/16
8+4 · 1/16
8+ 1/4 = 8 1/4
Answer:
(2,6)
Step-by-step explanation:
x-y=-4 -----> Get the one of the variables by themselves
x=-4+y -----> All i did was adding the y to the the other side to get x by itself
Now all you do is to substitute the in the equation into the other equation
x=-4+y --------------> 6(-4+y)-4y=-12
Then solve
Now since you have your y now all you need to do is to do the same thing
Substitute the y in for the other equation
Then there you go
Answer:
Step-by-step explanation:
b² - 4b - 12 = b² - 6b + 2b - 2*6
=b*(b -6) + 2*(b - 6)
= (b - 6) (b + 2)
b² - 4b - 12 = 0
(b - 6) (b + 2) = 0
b - 6 = 0 or b + 2 = 0
b = 6 or b = -2
