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2 years ago

1) There are 25 rows of seats on a concert hall: 25 seats are in the 1st row, 28 seats on the 2nd row, 31 seats on

Mathematics

1 answer:

Yuliya22 [10]2 years ago

6 0

Answer:

Step-by-step explanation:

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7 qt. 2c. =______ c.

nordsb [41]

Well, since 1 quart equals 4 cups, multiply 7 by 4.
You'll get 28 cups.

Now add te 2 cups, and you get 30.

So: 7 quarts, 2 cups = 30 cups.

5 0

2 years ago

PLS HELP ME PLSSSS WHATS THE ANSWER

Paraphin [41]

Answer:

Step-by-step explanation:

I think its D cuz there should be one bar with negative value

4 0

2 years ago

Scores from an exam are normally distributed with a mean of 85 and a standard deviation of 5. Suppose 188 students take the exam

charle [14.2K]

The mean is $\mu=85$ and standard deviation is $\sigma=5$ . Then the variable $X\sim N(85,5)$ .

Use substitution $Z=\dfrac{X-\mu}{\sigma}=\dfrac{X-85}{5}$ , then the variable $Z\sim N(0,1)$ .

The probability $Pr(X>80)$ can be calculated in the following way:

for X=80, $Z=\dfrac{80-85}{5} =-1$ and $Pr(X>80)=Pr(Z>-1)$ . From the diagram $Pr(Z>-1)=0.34+0.34+0.135+0.025=0.84$ .

Conclusion: if 188 students take the exam, then 188·0.84=157.92 (157) would receive a score above 80

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2 years ago

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Simplify 3(2x - 5). I need help asap

Rzqust [24]

Answer:

6x-15

Step-by-step explanation:

8 0

2 years ago

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Prove that the value of the expression<br> (16^3–8^3)(4^3 +2^3) is divisible by 63.

Darya [45]

Answer:

Step-by-step explanation:

16^3 - 8^3

Take out 8^3 as a common factor.

16^3 = 2^3 * 8^3

8^3(2^3 - 1)

8^3(8 - 1) = 8^3 * 7

(4^3 + 2^3) Expand

64 + 8 Combine

72 = 9 * 8

Conclusion

(8*3 * 7 )(9*8)

7*9 = 63

So any number containing 63 will divide into the reduced form of

(16^3–8^3)(4^3 +2^3)

7 0

1 year ago