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3 years ago

13x-9=16 plz solve for x

1 answer:

4 0

13x-9=16
+9 +9
13x= 25
---- -----
13x 13x

x=1.92

Add nine to both sides of equation to cancel out the negative nine. Then, divide both sides by 13, which will result in the answer listed above.

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9/25 of Polly's co-workers prefer tea over coffee. 25 What percent of Polly's co-workers tea over coffee?

Morgarella [4.7K]

To convert a fraction to a percentage you multiply by 100.

(9 / 25) * 100

= 9 * 100/25

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6 0

4 years ago

Read 2 more answers

The sum of half of a number and 8 less<br> than the number is 25. Find the number.

LuckyWell [14K]

Answer:

The number is 22

Step-by-step explanation:

let x = the number

$\frac{1}{2} x + x - 8 = 25 \\ \frac{1}{2} x + x - 8 + 8 = 25 + 8 \\ \frac{1}{2} x + x = 33 \\ factor \: out\: x \: on \: the \: left \\ x( \frac{1}{2} + 1) = 33 \\ divide \: both \: sides \: by \: \frac{1}{2} + 1 \\ \frac{x( \frac{1}{2} + 1) }{ \frac{1}{2} + 1} = \frac{33}{ \frac{1}{2} + 1} \\ x = \frac{33}{ \frac{3}{2} } \\ x = \frac{66}{3} \\ x = 22$

let's factor out x from the left hand sid

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3 years ago

Find the length of the missing side. The triangle is not drawn to scale.<br> 20 m<br> 16 m<br> *

Nataly [62]

Answer:

Step-by-step explanation:

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3 years ago

Quick math problem, need help ASAP!

adelina 88 [10]

Answer:

I think it's systamatic. I'm not completely sure sorry

Step-by-step explanation:

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4 years ago

The six faces of a cube are painted black. The cube is then cut into <img src="https://tex.z-dn.net/?f=5%5E3%20%3D%20125" id="Te

Rasek [7]

Answer:

The probability that a randomly selected small cube is rolled and the face on the top is black is P=0.2.

Step-by-step explanation:

We have a cube, with the faces painted black, that each side is divided in 5, so we end up with 125 cubes.

We have to calculate the probability that a randomly selected cube is rolled and the face on the top is black.

This probability is equal to the proportion of black area in the total area of the cube.

We can define the side of the original cube as A=5a, being a the side of the small cubes.

The area that is painted black is equal to the sum of 6 squares of side A. In terms of a, that is:

$S_b=6\cdot A^2=6\cdot(5a)^2=6\cdot25a^2=150a^2$

The total area of the 125 small cubes is:

$S=125(6a^2)=750a^2$

Then, the ratio of black surface to the total surface is:

$s_b/s=(150a^2)/(750a^2)=0.2$

Then, we can conclude that the probability that a randomly selected small cube is rolled and the face on the top is black is P=0.2.

7 0

4 years ago