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3 years ago

Fred buys a video game disk for $8 after a 20% discount. what is the original price?

1 answer:

4 0

I believe this is the answer, im so sorry if im wrong

8 dollars is discount
100-20=80 so
8 dollars =80%
1 dollar=20%
80+20=100
8 + 1 = 9

original price=$9

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The triangles shown are similar. Find MV.

Mnenie [13.5K]

Answer:

9 units

Step-by-step explanation:

The complete question in the attached figure

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional

$\frac{MT}{CS}=\frac{MV}{CI}$

substitute the given values

$\frac{3}{2}=\frac{MV}{6}$

solve for MV

Multiply in cross

$2MV=3(6)\\MV=9\ units$

3 0

3 years ago

What's LCD<br> 5/6<br> 3/18<br> 7/9<br> 1/126

Rudiy27

Answer:

126.

Step-by-step explanation:

One way to do this is to see if 126 is divisible by 6,9 and 18. If so then the LCD is 126.

Use your calculator to check.

It is 126.

8 0

3 years ago

Yuki bought a pound of confetti for \$12$12. What is the price, in dollars, per ounce of confetti? There are 1616 ounces in 11 p

tatiyna

Answer:

$0.75

Step-by-step explanation:

We have been given that Yuki bought a pound of confetti for $12.

To find the price of per ounce of confetti, we will divide the total price of 1 pound confetti by number of ounces in 1 pound.

1 pound = 16 ounces.

Let us divide 12 by 16 to find the price of confetti per ounce.

$\text{Price of per ounce confetti}=\frac{12}{16}$

$\text{Price of per ounce confetti}=\frac{3}{4}$

$\text{Price of per ounce confetti}=0.75$

Therefore, the price of per ounce confetti is $0.75.

3 0

4 years ago

A forest covers 31,000 acres. A survey finds that 0.8% of the forest is old-growth trees. How many acres of old-growth trees

Murrr4er [49]

Answer:

248 acres

Step-by-step explanation:

A forest covers 31,000 acres

0.8% of the forest old growth trees

There are 0.8% × 31000 = 248 acres of old growth trees

3 0

2 years ago

Relationships between means, standard deviations, X values,and z-scores

Vlada [557]

Answer:

a) The average salary of firefighters in Portugal is $583.

b) The standard deviation of the salary of firefighters in Portugal is $319.8

Step-by-step explanation:

We are given the following in the question:

a) Standard Deviation, σ = $145.80

We are given that the distribution of salary of professor is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

A salary of $510.10 has a z-score of -0.50.

Putting values, we get,

$-0.50 = \displaystyle\frac{510.10-\mu}{145.80}\\\\\mu = 0.50(145.80) + 510.10\\\Rightarrow \mu = 583$

Thus, the average salary of firefighters in Portugal is $583.

b) Mean, μ = $2,132

We are given that the distribution of salary of computer programmers is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

The salary of $2,291.90 has a z-score of +0.50

Putting values, we get,

$0.50 = \displaystyle\frac{2291.90-2132}{\sigma}\\\\\sigma= \frac{2291.90-2132}{0.50}\\\\\sigma = 319.8$

Thus, the standard deviation of the salary of firefighters in Portugal is $319.8

6 0

4 years ago