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Anna [14]
3 years ago
6

Evaluate x+y when x=−4\5 and y=1\3. Write your answer as a fraction or mixed number in simplest form.

Mathematics
1 answer:
Hunter-Best [27]3 years ago
7 0

Answer:

When x=−4\5 and y=1\3 we get x+y = -7/15

Step-by-step explanation:

We are given :

x=−4\5 and y=1\3

We need to evaluate : x+y

Solving:

x+y\\=-\frac{4}{5}+\frac{1}{3}

Taking LCM of denominators 5 and 3, we get 15

=\frac{-4*3+1*5}{15}\\=\frac{-12+5}{15}\\=\frac{-7}{15}

So, when x=−4\5 and y=1\3 we get x+y = -7/15

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One light-year equals 5.9 x 1012 miles. How many light-years are in 6.79
inna [77]

Option B

The number of light years in 6.79 \times 10^{16} miles is 11508 light years

<em><u>Solution:</u></em>

Given that,

One light-year equals 5.9 x 10^12 miles

Therefore,

1 \text{ light year } = 5.9 \times 10^{12} \text{ miles }

To find: Number of light years in 6.79 \times 10^{16} miles

Let "x" be the number of light years in 6.79 \times 10^{16} miles

Then number of light years in 6.79 \times 10^{16} miles can be found by dividing 6.79 \times 10^{16} miles by miles in 1 light year

\text{Number of light years in } 6.79 \times 10^{16} miles = \frac{6.79 \times 10^{16}}{5.9 \times 10^{12}}\\\\\text{Use the law of exponent }\\\\\frac{a^m}{a^n} = a^{m-n}\\\\\text{Number of light years in } 6.79 \times 10^{16} miles = \frac{6.79}{5.9} \times 10^{16-12}\\\\\text{Number of light years in } 6.79 \times 10^{16} miles = 1.1508 \times 10^4\\\\\text{Number of light years in } 6.79 \times 10^{16} miles = 11508

Thus number of light years in 6.79 \times 10^{16} miles is 11508 light years

3 0
3 years ago
1 and 1/4 divided by 7
ludmilkaskok [199]

Answer:

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Step-by-step explanation:

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4 0
3 years ago
Please help as soon as possible
GenaCL600 [577]

Answer:

The first is -4 and the second is 10

Step-by-step explanation:

7 0
3 years ago
2x - 10 = 20 pls help?
Anettt [7]

Answer:

x=15

Step-by-step explanation:

2x-10=20

2x-10+10=20+10

2x=30

2x/2 = 30/2

x=15

3 0
3 years ago
Owen receives $10 and puts it into his savings account. He adds $0.50 to the account each day for a number of days, d, after tha
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Answer:

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Step-by-step explanation:

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3 years ago
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