Kenneth S. answered • 09/07/17

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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018

It appears that all you have to do is replace(substitute) the letters x and y with numbers that are given to you.

"PLUG AND CHUG!"

I'll do one for you and then you can do the other: 7x+8y if x=7 and y=8 means

7(7) + 8(8) = 49 + 64 = 113.