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Naddik [55]
3 years ago
9

Amy has a collection of dimes and quarters. If the expression

Mathematics
1 answer:
Soloha48 [4]3 years ago
7 0

Answer:

the value of the dimes

Step-by-step explanation:

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The sum of the areas of two circles is 80 pi square meters find the length of the radius of a radius of each circle if one of th
Leno4ka [110]
Let x=small circle
2x = bigger circle

πx^2 + π(2x)^2 = 80π
x^2 + 4x^2 = 80
5x^2 = 80
x^2 = 16
x = +/- 4
but we need the positive one because there's no negative measurement so
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3 0
3 years ago
The weight of a small Starbucks coffee is a normally distributed random variable with a mean of 330 grams and a standard deviati
just olya [345]

Answer:

Weights of at least 340.1 are in the highest 20%.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 330, \sigma = 12

a. Highest 20 percent

At least X

100-20 = 80

So X is the 80th percentile, which is X when Z has a pvalue of 0.8. So X when Z = 0.842.

Z = \frac{X - \mu}{\sigma}

0.842 = \frac{X - 330}{12}

X - 330 = 12*0.842

X = 340.1

Weights of at least 340.1 are in the highest 20%.

3 0
3 years ago
Last two answer for both or no brainleist
professor190 [17]

Answer:

IM NOT SURE BUT DO U GO TO GEM PREP

Step-by-step explanation:

6 0
3 years ago
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Please help!!! :( i will give brainliest answer
Rasek [7]

Answer:

D

Step-by-step explanation:

a triangles angles have to add up to 180 degrees

p.s.I hope this helps

4 0
2 years ago
Classify each pair of numbered angles.
kifflom [539]
Adjacent angles are angles with a common side and vertex, linear pairs are adjacent angles that are supplementary, and vertical angles are angles made by the same two lines but on opposite sides.

For the first one, 5 and 6 clearly do not share a side but they are made up by the same 2 lines and are opposite of each other, making them vertical.

For the next one, since the angles only share 1 line (and not a side) they can't be any of the above. 
5 0
3 years ago
Read 2 more answers
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