I think it is 15 percent is a statistic.
I am not 100% sure if it is right or not but I hope it helps!
28. multiply 12 by 5 =-60
29. divide 39 by 3 = 13
30.divide 15 by 4 = 3.75
31. multiply 2 by 10 = -20
1. To solve for s you need to get s alone on the left side.
2. subtract 4t from both sides of the equation.
s+4t=r
-4t -4t
3. Your answer is:
s=r-4t
A.m=Fa and <span>C.a=m/F....
Hope this helps you!!! =')</span>
Make the fractions into common denominators
turn 1/2 into 2/4 (common denominator of 4 with 1/4)
then add them
8+7 is 15
1/4+2/4 is 3/4
15+3/4 is 15 3/4