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2 votes
Evaluate the expression 6x + 21y when Y = 4 x=3

2 Answers

5 votes

Answer: 102

Step-by-step explanation: 6x + 2y

6(3) + 21(4)

18 + 84

102

basically you just plug in 4 where it says y in the equation and plug in 3 where it says x in the equation and solve :))

User TimTeaFan
by
5.1k points
4 votes

Answer:

102

Explanation:

You have to substitute x and y. Since x = 3 and y = 4, you would write the equation as 6(3) + 21(4). Multiply that, and you get 18 + 84. Add that together, and you get the answer 102.

User Manjar
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4.8k points