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3 years ago

Evaluate qr/q + r when q = 8 and r = 13

Mathematics

2 answers:

Semenov [28]3 years ago

8 0

Your going to substitute in the numbers for the variables.

8*13 / 8 + 13 =

8*13 = 104

104/ 8 + 13 =

8 + 13 = 21

104/21= 4.95

So the answer is 4.95.

Hope this Helps!!

joja [24]3 years ago

7 0

so it would be 8x13/8+13, which would simplify out to be 104/8+13 which would then simplify out even more to be 104/21 as a fraction or 4.95 as a decimal

hope this helps!! :) ❤❤❤❤

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Answer:

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Step-by-step explanation:

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Ede4ka [16]

Answer:

{58.02007 , 61.97993]

Step-by-step explanation:

Data are given in the question

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zysi [14]

Answer:

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Please help me!

Alexandra [31]

In constructing the equation, you need to know the following:

1. What don't we know? How many minutes you must talk to have the same cost for both calling plans. So, let x be the number of minutes.
2. What do we know? Plan 1 charges $17.50 per month plus $0.17 per minute used and Plan 2 charges $32 per month plus $0.07 per minute used.

So the equation must look like this: 17.50 + .17x = 32 + 0.07x

Solving the equation:

1. Multiply both sides by 100
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2. Subtract 1750 from both sides
1750 + 17x - 1750 = 3200 + 7x - 1750
17x = 7x +1450

3. Subtract 7x from both sudes
17x - 7x = 7x + 1450 - 7x
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4. Divide both sides by 100
10x / 10 = 1450/10

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145 minutes is the number of minutes you must talk to have the same cost for both calling plans.

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3 years ago