Answer:
x = -9/2
Step-by-step explanation:
-4x - 11 = 7
-4x = 7 + 11
-4x = 18
x = -18/4
This is the way I do it to find the average.
10 girls times 70 = 700
15 boys times 80= 1200
700+1200=1900 all their scores
1900÷25 (number of boys and girls)=76 or 76%
2.2y=1x or just x
The posssible factors are
x^2 + 4x - 32
(x+8)(x-4)
x^2+ 14x - 32
(x+16)(x-2)
(x+32)(x-1)
x^2+31x-32
