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3 years ago

HELP PLS.Sonia takes a 4/5-mile walk every day. What part of her walk has she completed once she has walked 3/5 mile?

1 answer:

7 0

So, the question’s a bit weird, but I’m going to assume it’s asking for what fraction of her walk she had completed:

Basically you need to divide 3/5 by 4/5

Dividing a fraction is the same as multiplying as the reciprocal of the fraction (the top and bottom get reversed)

Therefore you need to find 3/5 • 5/4

Solving this should get you 15/20, which can be simplified to 3/4.

So the answer is she has completed 3/4 of her walk (75%)

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Choose all the numbers that are common multiples of 4 and 5.

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Answer:

Step-by-step explanation:

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3 years ago

Can teachers see how much time you spend on Delta Math?

NARA [144]

Answer:

Yes

Step-by-step explanation:

Short answer- yes.

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3 years ago

What is the measure of angle Q to the nearest whole degree? 43° 49° 53° 58°

geniusboy [140]

Answer:

m∠Q ≈ 53°

Step-by-step explanation:

To find the measure of ∠Q, the law of cosines will need to be used. Lowercase letters represent the side lengths, while upper case letters represent angles.

In this situation, 'A' will be ∠Q. Therefore:

17² = 18² + 20² -2(18)(20)cosQ

Simplify:

289 = 324 + 400 -2(360)cosQ

Continue simplifying down:

-435 = -720cosQ

Divide both sides by '-720':

0.604 = cosQ

$cos^{-1}Q = 0.604$

m∠Q ≈ 52.83 or 53° rounded to the nearest whole degree.

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3 years ago

What survival rate in the 10th year would make the average of loss over the 10 year period equal to 38.0%

Marat540 [252]

Answer: 63%

Step-by-step explanation:

First step

Find the 10th year rate of loss that will make the average of loss over the 10 years to equal 38.0%.

Assume this rate is x;

$\frac{(36.2 + 29.0 + 46.2 + 37.5 + 40.9 + 40.0 + 32.6 + 40.5 + 40.1 + x)}{10} = 38.0\\\\\frac{343 + x}{10} = 38\\\\x = 380 - 343\\\\x = 37$

x = 37%

Second step - Survival rate

The survival rate is calculated by;

= 1 - rate of loss

= 1 - 37%

= 63%

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3 years ago