Ms.Thomas ordered 5 pencil packs, n notebooks, and 5 sets of markers. Write and algebraic expression that represents the cost of
1 answer:
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Answer:
It's the law of cosines
Step-by-step explanation:
law of cosines states that
so we know that a = 7, b = 4, and alpha would be 135 degrees, so just plugging it in gets us 49+16-2*7*4*(-0.707) = 65 + 39.59 = 104.59