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nignag [31]
3 years ago
8

You earned an 82% on a math test. You answered 18 questions correctly.How many questions were on the test

Mathematics
1 answer:
Nadya [2.5K]3 years ago
4 0

Answer:

22

Step-by-step explanation:

The easiest way to do this is to multiply the number you got right by 1+ the percent you got wrong. In this case it would be 1+.18. If you multiply 18 by 1.18 you get 21.24. Because you cant have part of a question you need to round up. To check you can divide 18 by 22 and you get 81.81. I hope this helps!

You might be interested in
39.9875 to nearest thousand​
Ksju [112]

Answer:

39.988

Step-by-step explanation:

Thousandths you mean?

If so: 39.988 because 39.987 round up.

6 0
2 years ago
The perimeter of a rectangle is 28 cm and<br>its length is 8 cm. Find its breadth.​
Yakvenalex [24]
Answer:
The width of the rectangle is 6cm.

Explanation:
Perimeter=2(length+width)
28=2(8+w)
Distribute 2 into the parentheses
28=16+2w
Combine like terms
28-16=2w
12=2w
Divide both sides by 2
6=w

I hope this helps! Please comment if you have any questions.
7 0
3 years ago
Solve the system by the substitution method.<br> x-2y = -2<br> y = - 3x + 8
aliina [53]

x-2y = -2

x-2(-3x+8)=-2

mutiply the bracket by -2

(-2)(-3x)=6x

(-2)(8)=-16

x+6x-16=-2

7x-16=-2

move -16 to the other side

sign changes from -16 to +16

7x-16+16=-2+16

7x= -2+16

7x= 14

divide both sides by 7

7x/7=14/7

x=2

Find y by using the substitution method

y=-3x+8

y=-3(2)+8

-6+8

=2

Answer:(2,2)

6 0
3 years ago
What’s 2+2 because I need help
nikklg [1K]
4 is the answer because it’s just common sense
3 0
3 years ago
Read 2 more answers
What is (20-(-16))=20+16=36
Anna71 [15]

Answer:

Step-by-step explanation:

i think its 5/144=0.03472

4 0
3 years ago
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