Evaluate the following algebraic expression if a equals 3 and b equals 4 2a^+5b

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asked May 19, 2019 173k views

1 Answer

Ashleedawg · Answer 1 · 2019-05-24T01:28:56+0000

replace a and b with their number value:

2a^2 + 5b = 2(3)^2 +5(4)
do the 3^2 first: 3^2 = 9
so now you have 2(9) +5(4)
now multiply both sets of numbers: 2 x 9 = 18 and 5 x 4 = 20
now add them:

18 +20 = 38

Evaluate the following algebraic expression if a equals 3 and b equals 4 2a^+5b

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