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dem82 [27]
3 years ago
5

Use mental math to find the sum. 80+40+170

Mathematics
2 answers:
ICE Princess25 [194]3 years ago
8 0

Answer:

290

Step-by-step explanation:

If you like my answer than please mark me brainliest thanks

MissTica3 years ago
6 0

Answer:

290

Step-by-step explanation:

80+40=120

120+170=290

290

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storchak [24]

Answer:

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Step-by-step explanation:

6 0
2 years ago
The sum of a number and 9 is multiplied by -2 and the answer is -8
nadya68 [22]
9(-2)+x=-8
And x would be positive 26
7 0
3 years ago
Find the ratio in simplest form.
Ray Of Light [21]

Answer:

.6 or 1.5

Step-by-step explanation:

change it to decmail

6 0
3 years ago
Read 2 more answers
The length of a picture frame is 7 inches more than the width. For what values of x is the perimeter of the picture frame greate
makkiz [27]
P=2(L+W)
l=x+7
w=x
P=2(x+7+x)
P=2(2x+7)
P=4x+14

hast to be greater than 154

P>154
4x+14>154
minus 14 both sides
4x>140
divide 4
x>35


4 0
3 years ago
A therapist wanted to determine if yoga or meditation is better for relieving stress. The therapist recruited 100 of her high-st
schepotkina [342]

Answer:  Choice B

There is not convincing evidence because the interval contains 0.

========================================================

Explanation:

The confidence interval is (-0.29, 0.09)

This is the same as writing -0.29 < p1-p1 < 0.09

The thing we're trying to estimate (p1-p2) is between -0.29 and 0.09

Because 0 is in this interval, it is possible that p1-p1 = 0 which leads to p1 = p2.

Therefore, it is possible that the population proportions are the same.

The question asks " is there convincing evidence of a difference in the true proportions", so the answer to this is "no, there isn't convincing evidence". We would need both endpoints of the confidence interval to either be positive together, or be negative together, for us to have convincing evidence that the population proportions are different.

5 0
3 years ago
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