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bearhunter [10]
2 years ago
8

HELP ME OUT FAST (I will make brainlist to whoever that show explaination.)

Mathematics
1 answer:
aksik [14]2 years ago
8 0

Answer:

2 3/4 Gallons

Step-by-step explanation:

4 1/2-1 3/4= 2 3/4

Convert 4 1/2 to 4 2/4 then subtract and you will get 2 3/4

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Test scores are normally distributed with a mean of 500. Convert the given score to a z-score, using the given standard deviatio
Bond [772]

Answer:

The percentage of students who scored below 620 is 93.32%.

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 question, we have that:

\mu = 500, \sigma = 80

Percentage of students who scored below 620:

This is the pvalue of Z when X = 620. So

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

Z = \frac{620 - 500}{80}

Z = 1.5

Z = 1.5 has a pvalue of 0.9332

The percentage of students who scored below 620 is 93.32%.

3 0
3 years ago
Read 2 more answers
A square orange rug has a blue square in the center. The side length of the blue square is x inches. The width of the orange ban
Ivahew [28]

Answer:

(x+12)(x+12)-x^2

x^2 + 2(12)(x)+12^2-x^

=24x+144

Step-by-step explanation:

3 0
3 years ago
Find the area of the rhombus.<br> A=<br> square units
Olin [163]
The answer should be 24 square units.

5 is the hypotenuse and the one we need is the base and the height. They gave us the height, which was 6 in total but 3 for the triangle. But we needed to find the base.

In order to do that, we need to use the Pythagorean Theorem.

a^2+b^2=c^2

3^2+b^2=5^2

9+b^2=25

Subtract 9 from both sides

b^2=16

Then square root both sides.

b=4.

Now that we have the base, you can then find the area of the triangle.

BH/2
4*3/2
12/2
6

So one triangle equals to 6. Then multiply that by 4 to find the area of the rhombus. Which would be 24 square units.

7 0
3 years ago
Chloe drives from her house to her grandmas house 48 miles away in an hour and 12 minutes. How fast was she driving on average?
mestny [16]

Answer:

40 miles per hour

Step-by-step explanation:

change hours and minutes to hours

12 minutes  = 12 minutes * 1 hr/ 60 minutes = 12/60 hrs

12/60 = 1/5 = .2 hours

1 hours 12 minutes = 1.2 hours


48 miles in 1.2 hours

48/1.2 = 40 miles/hour


5 0
3 years ago
LB. Johnson middle school
Wewaii [24]

Answer:

What is this????

5 0
3 years ago
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