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Alexxandr [17]
3 years ago
13

1) 21v + 24 How do you get the answer

Mathematics
1 answer:
Lilit [14]3 years ago
4 0

solve for zero maybe

Step-by-step explanation:

21v+24=0

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Tony took a math quiz last week. There were 80 problems on the quiz and Tony answered 70% of them correctly. How many problems d
Nutka1998 [239]

Answer:

56 problems

Step-by-step explanation:

So we already know that the answer is: 56. However, a good help is knowing how to obtain this answer from the data provided.

Tony's quiz had 80 questions

Tony correctly answered 70% of them.

We can always write a percentage amount as a ratio by dividing the amount by 100.

70\% = \frac{70}{100} = 0.7.

This means that for every 100 questions, tony will respond correctly 70.

So, if Toni did a questionnaire of n questions, the amount that will answer correctly is calculated by the following expression:

C = n*\frac{70}{100}

If n = 80 then:

C = 80 * \frac{70}{100}\\\\C = 56

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3 years ago
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Step-by-step explanation:

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2 years ago
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Step-by-step explanation:

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