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Tanzania [10]
3 years ago
6

Which expression is equivalent to 63 + 27?

Mathematics
1 answer:
diamong [38]3 years ago
6 0

Answer:

A. (9x7)

Step-by-step explanation:

A. ( 9 x 7 ) = 63 and ( 9 x 3 ) = 27 (correct answer)

B. ( 7 + 3 ) = 10 and then 10 x 9 = 90 (incorrect answer)

C. ( 9 + 7 ) = 16 and ( 9 + 3 ) = 12 (incorrect answer)

D. ( 7 x 3 ) = 21 and then 9 + 21 = 24 (incorrect answer)

I hope this helps :)

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The temperature rose from -7°F to 21°F. By how much did the temperature increase?
horrorfan [7]

Answer: 28

Step-by-step explanation: you have to add 21 + 7 because your counting up from -7 to 21

7 0
3 years ago
A triangle has side lengths of 36 in, 27in, and 61 in. Classify it as acute, obtuse, or right.
Lady_Fox [76]
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3) Compare this sum to the square of the 3rd side.2,025 < 3,721
if sum > 3rd side²   Acute Triangleif sum = 3rd side²   Right Triangleif sum < 3rd side²   Obtuse TriangleTherefore, it is an Obtuse TriangleSource:http://www.1728.org/triantest.htm
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7 0
3 years ago
Whoshand was bigger 0.17 m or 0.165 m
S_A_V [24]
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5 0
4 years ago
If the standard deviation of a set of data is zero, what can you conclude about the set of values? The sum of the deviations fro
Rashid [163]

Answer:

All values are identical.

Step-by-step explanation:

We are given the following in the question:

If the standard deviation of a set of data is zero.

Then, all the values in data are identical.

This can be shown as:

Let all the terms in data be x.

Formula:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.  

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean =\displaystyle\frac{nx}{n} = x

Sum of squares of differences =

\displaystyle\sum (x_i - x)^2 = 0

\sigma = \sqrt{\frac{0}{n}} = 0

Thus, the correct answer is

All values are identical.

3 0
4 years ago
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Elena-2011 [213]

Answer:

y=2x+4

Step-by-step explanation:

8=2(6)+b

8=12+b

4=b

5 0
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