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timurjin [86]
3 years ago
12

2/5- -3/4 what would be the answer?

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
5 0

For this case we must simplify the following expression:

\frac {2} {5} - (- \frac {3} {4})

By definition of the law of multiplication signs we have to:

- * - = +

So, rewriting the expression we have:

\frac {2} {5} + \frac {3} {4} =\\\frac {4 * 2 + 5 * 3} {5 * 4} =\\\frac {8 + 15} {20} =\\\frac {23} {20} = 1.15

Thus, the answer in decimal form is 1.15.

Answer:

\frac {23} {20} = 1.15

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Which of the following will result in a rational number? Select all that apply.
romanna [79]

An expression is defined as a set of numbers, variables, and mathematical operations

<h3>What is an Expression?</h3>

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.

The given expression can be simplified as,

A.) 7 3/4 - (√11)/5 = (155-4√11)/20

B.) 7 3/4 ÷ (√11)/5 = 155/(4√11)

C) 7 3/4 + (√16)/5 = 166/20

D.) 7 3/4 + (√16)/5 = 31/5

The option that will result in a rational number is C and D.

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8 0
2 years ago
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Dmitriy789 [7]

Answer:

It will take both faucets 200 minutes to fill a pool with 9,000 liters of water

Step-by-step explanation:

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8 0
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Answer:

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Step-by-step explanation:

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3 years ago
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