If it is a negative exponent then that means it goes in the denominator and is raised to the power so if f = 3 then:f−2=1/(f2) = 1/9
if g = 27 then27/9 = 3So, the right option will be B.
Answer:
5.
Step-by-step explanation:
Answer:
43
Step-by-step explanation:
The midpoint means that it is in the middle. So 3x+8=5x-1. You need to find x to really fine the amount. Could be 8x+7, but if you want to find the amount without x you need to find x.
3x+8=5x-1
3x-3x+8=5x-3x-1
8=2x-1
8+1=2x-1+1
9=2x
9/2=4.5
if x is 4.5 then all you need to do is multiply 8 by 4.5 and then add 7. You will get 43.
Percent means parts out of 100
120%=120/100=1.2
80%=80/100=0.8
'of' means multiply
1.2 times a=0.8 times b
a=12
1.2 times 12=0.8 times b
14.4=0.8 times b
divide both sides by 0.8
18=b
so
a=12
b=18
a+b=12+18=30
