She should multiply y = x - 2 by -4...that way one x will be -4x and the other will be 4x and they will cancel out when added.
answer is -4
First write out your original equation.

Then use the law of exponents(power of a power) to simplify.

(Multiply the numerator and denominator exponents by the outside power.)
The answer is 4 to the 21st over 5 to the 6th.
Answer:
8 
Step-by-step explanation:
Find the LCD of the two fractions, which is six
3
= 3 
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5
+ 3
= 8
The next step is to reduce:
8
= 8
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Have a great summer :)
<span>The signs of the values of m and b<span> are the same.</span></span>
Answer:
0
Step-by-step explanation:
since the "b" in y=mx+b ends up being 0, that means that the y intercept is 0, which also means that the x intercept is 0.