3 years ago

Please help! Will give 20 points and a brainliest!

Mathematics

1 answer:

garik1379 [7]3 years ago

7 0

You have it on for 10 points

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Alison, Hector, and Myles had a challenge to see who could run the farthest in a month. Alison ran 21 miles. Hector ran 5 times

Leno4ka [110]

Myles ran 2 times what alison ran:
2x21 = 42

Hector ran 5 times as many miles as Myles:
42x5 = 210

therefore Hector ran 210 miles.

6 0

3 years ago

Will give brainliest, pls help ASAP!

bekas [8.4K]

Step-by-step explanation:

2 × 10⁸ - 7 × 10⁷

= 200,000,000 - 70,000,000

=130,000,000

= 1.3 × 10⁸

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2 years ago

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What does m EB equal? please show your work

nadya68 [22]

There are 360 degrees in a circle
10x+5+140+45+2+11x=360
21x+192=360
21=168
X=8

Eb would be the same as the central angle
80+5=85

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3 years ago

Find the measure of angle A

Wewaii [24]

Answer:

x=19

Step-by-step explanation:

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3 years ago

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if a and b are acute angles such that sinA=4/5 and cosB=12/13, calculate, without using tables: sin(a-b)

kolbaska11 [484]

$\sin \alpha = \frac{4}{5} \\ \cos \alpha = \sqrt{1-\sin^2 \alpha }= \sqrt{1- \frac{16}{25} } = \sqrt{ \frac{9}{25} }= \frac{3}{5} \\ \\ \cos \beta = \frac{12}{13} \\ \sin \beta = \sqrt{1-\cos^2 \beta }= \sqrt{1- \frac{144}{169} } = \sqrt{ \frac{25}{169} }= \frac{5}{13}$

$\\ \\ \sin (\alpha- \beta ) =\sin \alpha \cos \beta -\cos \alpha \sin \beta = \frac{4}{5}\times \frac{12}{13}- \frac{3}{5}\times \frac{5}{13} = \frac{48}{65}- \frac{15}{65}= \frac{33}{65}$

Answer:
sin(α-β) = 33/65

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3 years ago