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Dmitry_Shevchenko [17]
3 years ago
7

A student jog the same number of laps each week.9 students jogged 63 laps.How many laps will 13 students jog

Mathematics
1 answer:
Mazyrski [523]3 years ago
3 0
9/63 = 1/7 = 13/x
13 students jog 91 laps.
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Kai calculates that he spends 15% of the school day in science class. If he spends 42 minutes in science class, how many minutes
MissTica
You need to first multiply 100 by 42 then divide by 15

6 0
3 years ago
During an experiment, some water was removed from each of the 6 water tanks. If the standard deviation of the volumes of water i
Julli [10]

Answer:

First statement is correct.

Step-by-step explanation:

If we add or subtract a constant to each term in a set:  Mean will increase or decrease by the same constant.  Standard Deviation will not change.

If we increase or decrease each term in a set by the same percent (multiply all terms by the constant):  Mean will increase or decrease by the same percent.  Standard Deviation will increase or decrease by the same percent.

For example:

Standard Deviation of a set: {1,1,4} will be the same as that of {5,5,8} as second set is obtained by adding 4 to each term of the first set.

That's because Standard Deviation shows how much variation there is from the mean. And when adding or subtracting a constant to each term we are shifting the mean of the set by this constant (mean will increase or decrease by the same constant) but the variation from the mean remains the same as all terms are also shifted by the same constant.

So according to this rule, statement (1) is sufficient to get new Standard Deviation, it'll be 30% less than the old.. As for statement (2) it's clearly insufficient as knowing mean gives us no help in getting new Standard Deviation.

6 0
3 years ago
Which of the following complete the proof above?
svp [43]

Answer:

(A)

Step-by-step explanation:

To be honest, since all of them are different, as long as you get the first one right, you will get the others right. A is your answer, for the following reasons:

Reflexive Property: The Reflexive property states that the mirrored version of itself will always be congruent with itself. Generally, to make it easier, they will write it opposite (as they did in the given proof):

<em>line</em> AC ≅ <em>line</em> CA

~

8 0
3 years ago
Read 2 more answers
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sp2606 [1]

Answer:

1:2

Step-by-step 1:2explanation:

it doesnt say anything about colors. so how many dots? how many stripes? 2 and 4. Ratio: 2:4. Ratios can be fractions: 2/4. What does 2/4 simplify to? 1/2 That means for every 1 dot rectangle there are 2 stripe rectangle. Ratio : 1:2 or 1 to 2 or 1/2

5 0
3 years ago
Equation of the line that passes through the points (0,6) and (-5,2)?
Anarel [89]

Answer:

fsdfd

Step-by-step explanation:

5 0
2 years ago
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