80 percent multiplied by 80 is 64
he must get 64 points to obtain 80 percent of the mark
B: x = 5.5 or -5.5
(square root) -> 2x = 11
(divide by 2) -> x = 5.5 or -5.5

Subtract 2 from both sides.
Your equation will be: 4x+3=x
Subtract 4x from both sides.
Yoir equation will be: 3= -3x
Divide by -3x on both sides.
Your final answer: x=-1
Answer:
1 : 6 . . . . or 1/6
Step-by-step explanation:
We know 1 foot is 12 inches, so 5 feet is 5·12 = 60 inches. Zachary's scale factor is ...
drawing size : actual size = 10 inches : 60 inches = 1 : 6
This can also be written as the fraction 1/6.