mathgamer mathgamer

08-02-2016
Mathematics

contestada

Which expression has a value of 36 when x=4 and y=7 A. 2xy B. 2x+4y C. 6y-x D. 12x-2y

Respuesta :

metalhead69 metalhead69

08-02-2016

the answer is b, because 2x4 is 8, 4x7 is 28 and 8+28+36

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apologiabiology apologiabiology

08-02-2016

so subsitute
x=4y=7
A. 2xy=2 times 4 times 7=2 times 28=56 not 36
B. 2x+4y=2 times 4+4 times 7=8+28=36 true

the answer is B

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