Mx - y
5 times 3 - 8
15 - 8
=
7
Answer:

Step-by-step explanation:
Since it's a perfect square, we can simply use the formula:

Given the perfect square expression
. Apply perfect square formula:

Knowing laws of exponent is mandatory when it comes to algebra. Recall that:

Apply laws of exponent to simplify the terms or expression:

Since there are no like-terms to do operation with (these terms have different degrees so they are not considered to be like-terms.) Therefore, the final answer is:

64; Line pq is correspondent with line ab and triangle PQR is 4 time as big as triangle ABC.
Answer:
B
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Step-by-step explanation:
We can rule out A and D because of the area.
The area of a cube with side length 1/4 is 1/64, times 840, is 13 1/8
The area of a cube with side length 1/2 is 1/8, times 420, is 52 1/2