Is the goal to simplify? You just need to multiply the exponents for each factor:
(2z^2)^(-3)
= 2^(-3) x z^(2 x -3)
= (1/2)^3 x z^(-6)
= (1/8) x (1/z)^6
= 1/(8z^6)
It bisects so DE=EF
DE=5y
EF=13y-8
so
5y=13y-8
minus 13y both sides
-8y=-8
divide both sides by -8
y=1
DE=5y=5(1)=5
DE=EF=5
DF=DE+EF=5+5=10
DE=5
EF=5
DF=10
It should be 20x because you multiply what’s on the outside (5) with what’s on the inside (4x) which Is also called distributing. :)
Answer:
6 1/2
Step-by-step explanation:
4x - 8 = 5
4x = 13
13/4 = 6 1/2
x = 6 1/2
Turn the fractions into decimals by dividing the top number by the bottom number, then multiply that by 100 to make it a percentage:
34/40 = 0.85 x 100 = 85%
20/25 = 0.80 x 100 = 80%
53/60 = 0.883 x 100 = 88.3%
The Last one is the highest percentage, so 53/60 is the best score.
