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UNO [17]
3 years ago
12

Victoria took a test and got 80% of the questions right.she answered 20 questions correctly how many questions were on the test?

a)28 b)22 c)24 d)25
Mathematics
1 answer:
lions [1.4K]3 years ago
6 0

Answer:

d)25

Step-by-step explanation:

(80/100)*x=20

x=25

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Answer:

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5m - 3 n = 19\\m - 6n = - 7 \ => m = -7 + 6n\\\\Substitute \ m  \ in \  5m - 3n = 19\\\\5(-7 + 6n) - 3n = 19\\-35 + 30n -3n = 19\\27n = 19 + 35 \\27n = 54 \\n = 2\\\\Substitute \ n = 2 \  in \  m = -7 + 6n\\\\m = -7 + (6 \times 2) = -7 + 12 = 5

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