SOLUTION: If (4, b) is a point on the graph of y = 3x2 + 4x, what is b?

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Question 844159: If (4, b) is a point on the graph of y = 3x2 + 4x, what is b?


Answer by algebrahouse.com(1659) About Me  (Show Source):
You can put this solution on YOUR website!
y = 3x² + 4x

(4,b) is a point

b = 3(4)² + 4(4) {substituted 4 for x and b for y}
b = 3(16) + 16 {evaluated exponent and multiplied 4 by 4}
b = 48 + 16 {multiplied 3 by 16}
b = 64 {added}

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