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3 years ago

PLEASE HELP !!

Mathematics

1 answer:

Burka [1]3 years ago

6 0

The answer would be, B. (2,0)

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Of every 300 magic cakes Farah makes, 90 are chocolate, what percentage of chocolate cakes Farah makes?

navik [9.2K]

Answer:

Total magic cakes =300

chocolate cakes =90

so if you want the percentage of chocolate you will divide the number of chocolate cakes over the total number of chocolates

% of chocolate cakes = 90/300×100%

=30%

5 0

3 years ago

Find the least common factor denominator for these two rational 7/x^2 and 7/5x

MAVERICK [17]

X^2 and 5x both have x in common to factor out. To add or subtract them, 5x^2 is the least common denominator .

4 0

3 years ago

You use the associative property of multiplication to change how factors

White raven [17]

Answer:

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Step-by-step explanation:

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3 years ago

Suppose that a recent poll found that 49% of adults believe that the overall state of moral values is poor. Complete parts (a)

Lunna [17]

Answer:

The mean of X is 122.5 and the standard deviation is 7.9.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they believe that the overall state of moral values is poor, or they do not believe this. The probability of an adult believing this is independent of other adults. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

$E(X) = np$

The standard deviation of the binomial distribution is:

$\sqrt{V(X)} = \sqrt{np(1-p)}$

In this problem, we have that:

$n = 250, p = 0.49$

$E(X) = np = 250*0.49 = 122.5$

$\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{250*0.49*0.51} = 7.9$

The mean of X is 122.5 and the standard deviation is 7.9.

3 0

3 years ago

Find the missing side of the right triangle

vlada-n [284]

Answer:

$a {}^{2} + b {}^{2} = c {}^{2} \\ b {}^{2} = \sqrt{c {}^{2} - a {}^{2} } \\ b = \sqrt{14 {}^{2} - 3 {}^{2} } \\ b = \sqrt{196 - 9} \\ b = \sqrt{187} \\ b = 13.7$

I hope this help

6 0

3 years ago