12 Select ALL the correct answers.
Observe the expression below and select the true statement(s).
3y(7 + 2x) + 9xy - 10
The "2" in the first term is a constant.
The "x" in the second term is an exponent.
The "(7 + 2x)" in the first term is a factor.
The "10" in the third term is a coefficient.
The "9" in the second term is a coefficient
The "3y' in the first term is a factor

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step-by-step explanation:

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.