3 years ago

Negative integers whose product is 72

Mathematics

1 answer:

Stella [2.4K]3 years ago

7 0

Negative 9 times negative 8 equals postivie 72.

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TriangleABC has three sides with these lengths: AB=9, BC=40, and CA=41, What is the value of cos C?

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Answer:

9² = 40² + 41² - 2(40)(41) cos(C)

81 = 1600 + 1681 - 3280 cos(C)

81 = 3281 - 3280 cos(C)

-3200 = -3280 cos(C)

cos(C) = 3200 / 3280

cos(C) = 40 / 41

Step-by-step explanation:

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Step-by-step explanation:

Let's denote the amount of time we need to find out, t.

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3 years ago

Is 12 a solution to the equation × - 8 = 20? Explain how you know.

jeyben [28]

We have the following:

$x-8=20$

solving for x

$\begin{gathered} x=20+8 \\ x=28 \end{gathered}$

The solution of x is equal to 28, therefore 12 is not a solution of the equation

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Keith_Richards [23]

Answer: At least 13

Step-by-step explanation:

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