3 years ago

Charlie saved $130 from $260 he earned. What percent did he save?

Mathematics

1 answer:

JulsSmile [24]3 years ago

5 0

Answer: 50%

Step-by-step explanation:

130/260 = 0.5 = 50%

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Help me answer question 2.

melisa1 [442]

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3 years ago

How to solve <img src="https://tex.z-dn.net/?f=log_%7By%7D%285y%29%20%3D%202" id="TexFormula1" title="log_{y}(5y) = 2" alt="log_

Natalija [7]

Answer:

y = 5

Step-by-step explanation:

Expand the logarithm:

$\log_y{(5)}+\log_y{(y)}=2\\\\\dfrac{\log{(5)}}{\log{(y)}}+1=2 \quad\text{change of base formula}\\\\\dfrac{\log{(5)}}{\log{(y)}}=1 \quad\text{subtract 1}\\\\\log{(5)}=\log{(y)} \quad\text{multiply by log(y)}\\\\5=y \quad\text{take the anti-log}$

_____

You can also take the antilog first:

5y = y²

y(y -5) = 0 . . . . . subtract 5y, factor

y = 0 or 5 . . . . . y=0 is not a viable solution, so y=5.

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4 years ago

What is 0.69 expressed as a fraction in simplest form

Hitman42 [59]

Answer:

the answer is 69/100

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3 years ago

If 20 is one third of a number the result is the double of the number. what is the number?

PSYCHO15rus [73]

Answer: $12$

Step-by-step explanation:

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2 years ago

Read 2 more answers

-2(1.7x + 3.1) = 4<br> find x please

katrin2010 [14]

Answer:

x=-3

Step-by-step explanation:

you first distribute -2 then add 6.2 to both sides of the equation the finnaly divide by -3.4 to both side then you will get x

(-2)1.7x+(-2)3.1`

-3.4x-6.2=4

+6.2 +6.2

-3.4x=10.2

-3.4x/-3.4= 10.2/-3.4

x=-3

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3 years ago