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Leona [35]
3 years ago
14

Mark got 14 problems wrong on his test. His score was 72% correct. How many problems were on the test? Please show work.

Mathematics
1 answer:
stira [4]3 years ago
7 0
Consider that 100%-72%=28% represents the percentage of wrong answers. I would think as fractions as:
if 100%  is the total number of answers and 28% are the wrong ones
as
if x is the total you have 14 wrong you can write:
\frac{100}{28} = \frac{x}{14}
x=(100/28)*14=50 questions
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I need help please help me thanks
Nady [450]

Answer:

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Number 3 on the slope part might be the other way around if I'm wrong :)

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Find the value of x and the value of y for which (x,23) and (18,y) ate the points on the graph y=0.5x+15
shutvik [7]

Answer:

x=16; y=24

Step-by-step explanation:

for (x,23), 23=0.5x+15

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Some algae contains up to 50% oil by weight. How much oil is in a 7.3-ounce sample of this type of algae?
frutty [35]

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Let's expand the number 7.3

Then, we end up getting 7.30.

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Hope this helps you!

5 0
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AnnZ [28]

A,C,D

"B" is definitely not the answer because the fraction isn't negative but the decimal is negative which isn't right.

4 0
3 years ago
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erastovalidia [21]

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Step-by-step explanation:

4 0
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