Answer:
6/5
Step-by-step explanation:
4a5+28+6b7-30
4a5+6b7-2<—- this is a to the power of 5 , b to the power of 7
(Is that 5a or a to the power of 5 )
20a+28+42b-30
20a+42b-2<—— this is 5a , 7b
Answer:
Simplify the expression: 
Use the exponent power:

Apply the given rules;

Simplify:

then;

Therefore, the simplified expression of
is, 
Answer:
1.26 x 10^(24)
Step-by-step explanation:
hope this helped
She did not multiply both sides of the equation by 2.
2x-6y =-2
<u>+ 2x+6y=3
</u><u /> 4x =1
x=1/4
y=5/12