So 12% of a number is $75
12% of x is 75
0.12 of x is 75
0.12 * x = 75
divide both numbers by 0.12
x = 625
To check:
12% of 625 =?= 75
75 = 75
Hope this helps
(-20)(6)
-120
Just multiply those numbers together I believe
1. (f+g)(x)=7x^3-3x^3-8x^2+10x-2x-12=4x^3 - 8x^2 + 8x - 12
2. fg(x)=6-5(6x^2+x)=6-30x^2-5x
3. x^2+18x=44 | +36
x^2+18x+36=44+36
(x+6)^2=80
4. 2x+4y=20 |:2
x+2y=10
3x+2y=26
-----------------
3x-x=26-10
2x=16
x=16:2
x=8
x+2y=10
8+2y=10
2y=10-8
2y=2
y=2:2
y=1
5. 14x+y= -4
y= -4 -14x
y=3x^2-11x-4
-4 -14x = 3x^2-11x-4 |+4
-14x=3x^2-11x |+14x
0=3x^2+3x
3x(x+1)=0
x=0 or x=-1 is the solution
6. x^2-6x+8= x^2-2x-4x+8= x(x-2)-4(x-2)=(x-2)(x-4)
7. x^2-6x-27=0
x 1= (-6+V36+4*27)/2= (-6+V144)/2= (-6+12)/2=6/2=3
x2= (-6-12)/2= -18/2= -9
the point are ( 3,0) and (-9.0)
