SOLUTION: 150 IS WHAT PERCENT OF 750? SOLVE FOR X:0.4X-1.6=2.4X SOLVE FOR Y:8Y-3>2Y+15 FACTOR:49X^2-64

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: 150 IS WHAT PERCENT OF 750? SOLVE FOR X:0.4X-1.6=2.4X SOLVE FOR Y:8Y-3>2Y+15 FACTOR:49X^2-64      Log On


   

Question 91702: 150 IS WHAT PERCENT OF 750?

SOLVE FOR X:0.4X-1.6=2.4X

SOLVE FOR Y:8Y-3>2Y+15

FACTOR:49X^2-64
Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
150 IS WHAT PERCENT OF 750?
Use the formula:
Part/Whole = Percent/100
Plug-in the values and solve for the x-term:
150/750=x/100
(150)(100)=(750)(x)
15000=750x
15000/750=x
20=x
20%
.

SOLVE FOR X:0.4X-1.6=2.4X
-1.6=2.4x-0.4x
-1.6=2x
-1.6/2=x
-0.8=x
.
checking:
0.4X-1.6=2.4X
0.4(-0.8)-1.6=2.4(-0.8)
-1.92=-1.92 [checks out]
.
SOLVE FOR Y:8Y-3>2Y+15
8y-3>2y+15
8y-2y-3>15
6y-3>15
6y>15+3
6y>18
y>18/6
y>3
.
FACTOR:49X^2-64 [This is the different of two squares. It will always factor into (a+b)(a-b)
(7x-8)(7x+8)