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Nimfa-mama [501]
2 years ago
15

You earn a 90% on his science test you answer 18 questions correctly how many questions were on the test

Mathematics
2 answers:
Bogdan [553]2 years ago
8 0
Hello there!

The correct answer is 20.

Hope This Helps You!
Good Luck :)
gogolik [260]2 years ago
5 0
We can write a ratio equation 90/100 =18/x to show how many problems he got right on his science test.  

We can cross multiply to simplify our equation to 90x=1800.

Now we divide by 90 on both sides to get x=20.

There were 20 questions on the science test, if you answered 18 questions correct, your test score would be a 90%.
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Of 30 students 1/3 play sports 2/5 of them play soccer how many play soccer
vfiekz [6]
30 ÷ 3 = 10 = 1/3. So 10 students play sports. 10 ÷ 5 = 2 = 1/5, so 2 × 2 = 4 = 2/5. Your answer is 4 students. I hope this helps!
4 0
2 years ago
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a chef uses 4 3/4 cups of broth for 10 servings of soup. How much broth is used in one serving of soup?
mafiozo [28]
Set up a proportion. 4 3/4 cup broth is to 10 servings as x cups broth is to 1 serving soup.

x= amount of broth in one serving

(4 3/4)/10= x/1
cross multiply

(4 3/4)(1)= 10x
convert 4 3/4 to improper fraction

(19/4)(1)= 10x

19/4= 10x
divide both sides by 10

19/4 ÷ 10= x
to divide fractions, multiply by reciprocal of 10

19/4 * 1/10= x
multiply numerators; multiply denominators

(19*1)/(4*10)= x

19/40 cup= x


ANSWER: 19/40 cup in one serving

Hope this helps! :)
4 0
3 years ago
Why is the fraction 6/10 not written 0.06?
Kaylis [27]
Because 10 divided by 6 equals 6 tenths not 6 hundredths
3 0
3 years ago
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What is the value of 9^-1/2
qaws [65]

Answer:

81-1/2

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40 and right than say

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Bethany is 62 in tall Bethany's brother scott is 3 inches taller than her she is write Scott's height in feet and inches
MrRissso [65]
Scott is 62+3=65 inches tall, and there are 12 inches in a foot, so you get 65/12=about 5 whole feet. 5 whole feet is 60 inches in total, so we have a leftover 5 inches, meaning that Scott is 5 feet and 5 inches tall.
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