The expression (-4x + 9)^2 cannot be equal to (-4x)^2 + 9^2 because it is actually equal to the product of two factors (3 + 2sqrt x) (3- 2 sqrt x). One cannot use obviously distributive property. Hence the answer to this problem should be C. as she did not understand both perfect square trinomial and did not determine the product
By making a the subject of formula in the given equation, the value "a" is equal to 1/(56Q + 32GQ).
<h3>What is an equation?</h3>
An equation can be defined as a mathematical expression which shows that two (2) or more thing are equal.
In this exercise, you're required to solve for a from the given mathematical expression (equation) by making it the subject of formula. This ultimately implies that, all the other variables would be defined in terms of a and they would all be on the same side of the "equal to" symbol.
Making a the subject of formula, we have:
-4G + 1/8Qa = 7
1/8Qa = 7 + 4G
Multiplying both sides by 8Q, we have:
8Q × 1/8Qa = (7 + 4G) × 8Q
1/a = 56Q + 32GQ
a = 1/(56Q + 32GQ).
Read more on subject of formula here: brainly.com/question/21140562
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<span>7 out of 11 is the probability of rolling a 9</span>
