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3 years ago

For each expression, select all equivalent expressions from the list.

Mathematics

1 answer:

Keith_Richards [23]3 years ago

3 0

Answer:

A. 2 20x-8

B. 3 20y

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A falcon flew 70 miles in 3 hours. What was the speed of the falcon?

adell [148]

Answer:

23.3333333 miles per hour

23 1/3 miles per hour

10.43093333333333 meters / second

Step-by-step explanation:

Take the distance and divide by the time to find the speed

70 miles / 3 hours

1 mile = 1609.34 meters

1 hours = 3600 seconds

70 miles /3 hours * 1 mile /1609.34 meters * 1 hours / 3600 seconds

10.43093333333333 meters / second

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Help please!! -1/y^-4

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Step-by-step explanation:

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3 years ago

Calculate the mean given the frequency table

ratelena [41]

Answer:

15.6

Step-by-step explanation:

First, multiply the midpoint of each class by its frequency, as follows:

Class midpoint frequency midpoint*frequency

0-9 4.5 24 4.5*24 = 108

10-19 14.5 20 14.5*20 = 290

20-29 24.5 32 24.5*32 = 784

Total 76 1182

The mean is computed as the division between the addition of the "midpoint*frequency" column by the addition of "frequency" column.

mean = 1182/76 ≈ 15.6

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3 years ago

Fareed wants to add 1/4 +5/8 Add the fractions by using the giant one to create a common denominator

saul85 [17]

Hi!

This question is about math.

$\frac{1}{4}+\frac{5}{8}$

Least Common Factor 4 or 8: 8

Factors of 4 : 1, 2, 4 (prime factorization) (2*2)

Factors of 8: 1, 2, 4, 8 (prime factorization) (2*2*2)

Least Common Factor of a,b is the smallest positive number that divisible by both a and b.

Multiply each factor the greatest number of times it occurs in either 4 or 8.

Then multiply by the numbers.

$2*2*2$

$=8$

Multiply each numerator by the same amount needed to multiply its corresponding denominator to turn it into the Least Common Factor of 8.

For 1/4 multiply the denominator and numerator by the 2.

$\frac{1}{4}=\frac{1*2}{4*2}=\frac{2}{8}$

$\frac{2}{8}+\frac{5}{8}$

Since the denominator are equal, combine the fractions.

$\frac{2+5}{8}$

Add the numbers 2+5=7

$=\frac{7}{8}$

Hope this helps! Thank you for posting your question at here on Brainly. Have a great day.

-Charlie

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3 years ago