3 years ago

Nate solves the problem 3*5=15 by writing and solving 15÷5=3. Explain why Nate's method works

Mathematics

1 answer:

avanturin [10]3 years ago

4 0

Nathan method worked because...

multiplication and division are the inverse of each other.

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60 minutes is 20% of how many minutes show work on a number line

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2 years ago

How do you find the range of a function?

NISA [10]

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3 years ago

A triangle has sides of length 2, 2, and 3. Which of the following is the measure of the obtuse angle of the triangle?

kramer

Answer:

$97.18^{\circ}$

Step-by-step explanation:

An obtuse angle in the triangle is opposite to the greatest side. The greatest side in the triangle with sides lengths 2, 2 and 3 is side with length 3. By the cosine rule,

$3^2=2^2+2^2-2\cdot 2\cdot 2\cdot \cos \alpha,\\ \\9=4+4-8\cos \alpha,\\ \\-8\cos \alpha=9-4-4=1,\\ \\\cos \alpha=-\dfrac{1}{8},\\ \\\alpha\approx 97.18^{\circ}.$