Answer:
87
Step-by-step explanation:
A negative times a negative always equals a positive, and 10 times anything is just moving the decimal point to the right once, so 8.7 becomes 87.0

When c = 4 and it is applied to this equation, the answer is 32.
⭐ Answered by Hyperrspace (Ace) ⭐
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To solve for the value of x, you can simply add all of the values and expressions together and make it equal to 180 degrees, since the sum of all angles in a triangle add up to this amount.
Then we can solve for X, by algebra.
Dan isn’t correct it’s either c or d