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vivado [14]
3 years ago
9

Find the sum. Write the addition property you used. 28+29+42=

Mathematics
2 answers:
katen-ka-za [31]3 years ago
8 0

Answer:

Step-by-step explanation:

First your gonna brake up each number and seperate them for example

28

29

42

then your going to add up the ones side, 8,9,2, to get 19.

Then your going to add the tens side, 2,2,4, to get 8.

take the one from 19 and put it in the tens place to get 9 in the tens and 9 in the ones.

put 9 and 9 together to get 99.

Zolol [24]3 years ago
4 0

Step-by-step explanation:

28+29=57

57+42=99 so 99 should be your answer

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1/4 + 7/8 = ?<br> 2/3<br> 5/8<br> 1 1/8<br> 13/4
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Answer:

c

Step-by-step explanation:

1/4 + 7/8 =

2/8 + 7/8    Convert the 1/4 to the denominator as 8 so we can add the top number.

9/8      Add the top number.

1 1/8     Simplifly the result.

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3 years ago
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There are 5 boys in the eighth grade class and 9 girls . If mr. Jowers randomly selects one student to carry the Eagle folder ,
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4 years ago
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Does G equal 2.3?. because this is a very diffacult problem, but the answer may very well be 2.3.

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The pipe fitting industry had 546.5 thousand jobs in 2015 and is expected to decline at an average rate of 3 thousand jobs per y
lesya692 [45]

Answer:

The amount of jobs from fitting industry shall decline in 5.5 percent from 2015 to 2025.

Step-by-step explanation:

Due to the assumption of a yearly average rate, a linear function model shall be used. The expected amount of jobs (n) after a certain amount of years (t) is given by the following formula:

n = n_{o} + \frac{\Delta n}{\Delta t}\cdot t

Where:

n_{o} - Initial amount of jobs in pipe fitting industry, measured in thousands.

\frac{\Delta n}{\Delta t} - Average yearly rate, measured in thousands per year. (A decline is indicated by a negative sign)

If n_{o} = 546.5, t = 2025-2015 = 10\,years and \frac{\Delta n}{\Delta t} = -3\,\frac{1}{years}, then:

n = 546.5+\left(-3\,\frac{1}{year}\right)\cdot (10\,years)

n = 516.5

The percent change in jobs from pipe fitting industry is calculated as follows:

\%n = \left(1-\frac{n}{n_{o}}\right)\times 100\,\%

\% n = \left(1-\frac{516.5}{546.5}\right)\times 100\,\%

\%n = 5.5\,\%

The amount of jobs from fitting industry shall decline in 5.5 percent from 2015 to 2025.

4 0
3 years ago
The volume of a solid right pyramid with a square base is V units3 and the length of the base edge is y units.
Evgen [1.6K]

Answer:

Height of the pyramid = 3v/y² units

Step-by-step explanation:

We are given;

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The formula for volume of a pyramid is given as;

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Since the base is square, we will use the formula for square area which is A = side × side.

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5 0
3 years ago
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