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SOVA2 [1]
3 years ago
15

What is 225 square feet of 450

Mathematics
1 answer:
erik [133]3 years ago
6 0
I assume you mean what percentage it is? if so:

225/450 = 50%
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Which statement about numbers is true?
dybincka [34]

Answer:

c

Step-by-step explanation:

hope u have a blessed christmas and a happy new year

4 0
3 years ago
Read 2 more answers
Solve fast pls with explanation Marty simplified the expression 2(x - 2) - 2(3) as 2x - 8. Is he correct? Explain why or why not
Assoli18 [71]

Answer:

  • Marty is incorrect.

Step-by-step explanation:

<u>Let's check his work by simplifying the given expression.</u>

  • 2(x - 2) - 2(3)
  • => 2x - 4 - 6
  • => 2x - 10

When I compare Marty's result and this result, they are un-equal. Hence, Marty is incorrect.

<u>Marty's mistake</u>

  • Marty must've got the problem wrong because of not understanding the distributive property.
  • He probably forgot to multiply -2 by 2. Instead, he only subtracted 2 when he should've subtracted 4 from 2x.
3 0
2 years ago
Read 2 more answers
In​ March, a family starts saving for a vacation they are planning for the end of August. The family expects the vacation to cos
Makovka662 [10]
Deposited money:

March: 120
April: 120+(120×20)/100=120+24=144
May: 144+(144×20)/100=144+18,8=162,8
June: 162,8+(162.8×20)/100=162,8+32.56=195.36
July: 195.36+(195.36×20)/100=195.36+23.87=219.23
August: 219.23+(219.23×20)/100=219.23+43.85=263.08

120+144+162.8+195.36+219.23+263.08=1105.19
So the answer is no.
7 0
3 years ago
How to solve -2y-4=4(y-1)
tangare [24]
-2y-4=4(y-1)

Always remove the pararentheses as your first step.

-2y-4 = 4y - 4

Combine like terms.

-2y - 4y = 4 - 4

-6y = 0

Divide both sides by -6 to find y.

-6y/-6 = 0/-6

y = 0

Done



6 0
3 years ago
Read 2 more answers
IQ scores are known to be normally distributed. The mean IQ score is 100 and the standard deviation is 15. What percent of the p
Masja [62]

Answer:

47.06% of the population has an IQ between 85 and 105.

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 = 100, \sigma = 15

What percent of the population has an IQ between 85 and 105?

This is the pvalue of Z when X = 105 subtracted by the pvalue of Z when X = 85. So

X = 105

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

Z = \frac{105 - 100}{15}

Z = 0.33

Z = 0.33 has a pvalue of 0.6293.

X = 85

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

Z = \frac{85 - 100}{15}

Z = -1

Z = -1 has a pvalue of 0.1587

So 0.6293 - 0.1587 = 0.4706 = 47.06% of the population has an IQ between 85 and 105.

5 0
2 years ago
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