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Gekata [30.6K]
2 years ago
7

How can you write and solve equations involving rational numbers?

Mathematics
1 answer:
shusha [124]2 years ago
6 0

Convert the rational number to decimals, then solve it as a decimal instead, (with the optional choice of re-converting it back to rational).

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Which Trig. Function do you use to find X?
zvonat [6]

Answer:

Cosine

Step-by-step explanation:

Cosine = \frac{adjacent}{hypothenuse}

Cos 70 = \frac{x}{8}

0.633 = \frac{x}{8}

0.633 x 8 = \frac{x}{8} x 8

5.064 = x

7 0
2 years ago
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If a = -3, find the value of<br> a) 2a<br> b) a^2<br> c) 3a^2
White raven [17]

Answer:

a) -6

b) 9

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Step-by-step explanation:

2( - 3) =  - 6 \\  { - 3}^{2}  =  - 9 \\ 3 {( - 3)}^{2}  =  27

8 0
1 year ago
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Maggie needs to spend at least six hours each week practicing the piano. She has already practiced three and one fourth hours th
Allisa [31]

Answer:

3 1/4 + 2x ≥ 6

Step-by-step explanation:

Let X equal the remaining time she needs to practice.

You would have 2x

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You need to add the amount she already practiced to 2x.

Now you have: three and one fourth + 2x

This needs to be greater than or equal to 6.

I hope this helps you :)

6 0
3 years ago
The least common multiple of two numbers is 60, and one of the numbers is 7 less than the other number. What are the numbers? Ju
Aleks [24]
To do this we need to find the factors of 60 these are:
1 and 60
2 and 30
3 and 20
4 and 15
5 and 12
6 and 10
There is 1 pair that have a difference of 7 and that is 5 and 12
6 0
3 years ago
Rewrite the polynomial -2x3+4x5-3x2-7 in descending order, using coefficients of 0 for any missing terms
seropon [69]

4x5-2x3-3x2-7 descending means basically the same thing as greatest to least

8 0
3 years ago
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