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Tems11 [23]
3 years ago
12

4 students is ______ % of 20 students

Mathematics
1 answer:
Yuliya22 [10]3 years ago
5 0

Answer:

4 students

Step-by-step explanation:

We can say that 20 students represent 100 % and that 4 students represent x % of all students. Then we can use the proportion: 20 : 4 = 100 : x, or 20 / 4 = 100 / x. Then we will cross multiply: 20 x = 4 * 100, 20 x = 400, x = 400 : 20 , x = 20 %. Also we can say that 4 = 1/5 * 20 and 1/5 * 100 = 20 % Answer: 4 students is 20 % of 20 students. Hope this helps. Let me know if you need additional help!

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If the ratio was 0.5 in to 1.5, what is the actual length of the car
Sonja [21]

Answer:

Actual length = 36

Step-by-step explanation:

<u>0.5 inches</u> = <u>12 inches</u>

    1.5         =      x

0.5x = 18      Solve for x

x = 36

I hope this helped and please mark me as brainliest!

7 0
2 years ago
Which expression is equivalent to 7- 3x +2?​
Colt1911 [192]

Answer: 9-3x

Step-by-step explanation:

You add like terms

don't look at the 3x for now

positive 7 + positive 2 = 9

there is a negative sign next to 3x

9 goes first so

9 - 3x

8 0
4 years ago
Simply -3 3/4 divided by 2 1/2​
Dima020 [189]

Answer:

=-1\frac{1}{2}

Step-by-step explanation:

Given the following question:

-3\frac{3}{4} \div2\frac{1}{2}

In order to find the answer, we first convert the mixed numbers into improper fractions. Then we use KCF (Keep, Change, Flip) and solve.

-3\frac{3}{4} \div2\frac{1}{2}
-3\frac{3}{4} =12+3=-\frac{15}{4}
2\frac{1}{2}=2\times2=4+1=\frac{5}{2}
-\frac{15}{4} \div\frac{5}{2}
-\frac{15}{4} \times\frac{2}{5}
15\times2=30
4\times5=20
=-\frac{30}{20}
-\frac{30}{20} \div10=-\frac{3}{2}
-\frac{3}{2}=3\div2=-1\frac{1}{2}
=-1\frac{1}{2}

Hope this helps.

4 0
2 years ago
How to fill in the boxes
harina [27]
Put the % in the boxs
4 0
3 years ago
Read 2 more answers
A printer can print 40 pages in 1.6 minutes.
d1i1m1o1n [39]
A is 307.2

b is 6.4 min maybe just a little less
8 0
3 years ago
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