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Kazeer [188]
3 years ago
12

Ugentttt Identify each ratio as proportional or not to ratio 3:7

Mathematics
1 answer:
Aloiza [94]3 years ago
6 0

Answer:

1. Not proportional

2. Proportional

3. Proportional

4. Not proportional

Step-by-step explanation:

A trick I used was to divide 3 by 7 and I got around 0.42.

Then I proceeded to type the fractions into the calculator to see which ones gave me 0.42.

Example: 12 divided by 28 is equal to about 0.42 so it is <u>proportional</u>

24 divided by 54 is not 0.42 so it is <u>not proportional</u>

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3 years ago
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Three times the sum of a number and seven is negative thirty-six. What is the number?
Katarina [22]

Answer:

n =-19

Step-by-step explanation:

3* (n+7) = -36

Distribute

3n+21 = -36

Subtract 21 from each side

3n+21-21 = -36-21

3n = -57

Divide by 3

3n/3 = -57/3

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3 years ago
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An elementary school class ran 1 mile in an average of 11 minutes with a standard deviation of 3 minutes. Rachel, a student in t
EleoNora [17]

Answer:

Rachel

Step-by-step explanation:

We need to measure how far (towards the left) are the students from the mean in<em> “standard deviations units”</em>.  

That is to say, if t is the time the student ran the mile and s is the standard deviation of the class, we must find an x such that

mean - x*s = t

For Rachel we have

11 - x*3 = 8, so x = 1.  

Rachel is <em>1 standard deviation far (to the left) from the mean</em> of her class

For Kenji we have

9 - x*2 = 8.5, so x = 0.25

Kenji is <em>0.25 standard deviations far (to the left) from the mean</em> of his class

For Nedda we have

7 - x*4 = 8, so x = 0.25

Nedda is also 0.25 standard deviations far (to the left) from the mean of his class.

As Rachel is the farthest from the mean of her class in term of standard deviations, Rachel is the fastest runner with respect to her class.

8 0
3 years ago
4 + 3 + 7 to the 3rd power
bagirrra123 [75]
4+3=7 7+7=14 14*14=196 196*14=2744, sooo it's 2744

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2 years ago
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jasenka [17]

Answer:

13,7

Step-by-step explanation:

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3 years ago
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