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Consider the algebraic expression --50 + 2a
a. Write a sentence to describe the meaning of the algebraic expression.
b. Evaluate the expression when a = 2.5. Show your work.

Respuesta :

altavistard

Answer:

-45

Step-by-step explanation:

-50 + 2a represents the sum of the constant -50 and twice the value of the variable a.

If a = 2.5, then -50 + 2a has the value  -50 + 2(2.5) = - 50 + 5 = -45.

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