11. 5x^2-30=0
+30 to both sides
5x^2=30
÷5 both sides
x^2=6
square root both sides
x= +square root 6 ,- square root 6
12. 4x^2+10=26
-10 both sides
4x^2=16
÷4 both sides
x^2=4
square root both sides
x=+2,-2
13. a=72yrd^2
l=2w
w=?
a=l×w
72=2w×w
72=2w^2
÷2 both sides
36=w^2
square root both sides
w=+6,-6
a measurement can't be - so w=6
Plug into l=2w
l=2×6
l=12
w=6
If he sang the same number of songs each month, he sang 80 songs per month.
960/12 (months) = 80 (songs per month)
Here is the final answer
3 2/9
=29/9. Hope it help!
Answer:
The answer is D, 60%.
Step-by-step explanation: How I did it is 100/30 then times that answer by 18.
