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dangina [55]
2 years ago
7

Ay bought a guitar on sale at 45% off. The original price was $576.75.

Mathematics
1 answer:
Sindrei [870]2 years ago
8 0

Answer:

$317.20

Step-by-step explanation:

hope this is right and hope it helps:D

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on the last 5 quizzes, marco has earned a total of 21 out of 25 possible points. if he has a perfect score on the next several q
nevsk [136]

Using the mean concept, it is found that we will need 15 more points to bring up his average up to 90%.

The mean of a data-set is the <u>sum of all observations divided by the number of observations</u>.

In this problem:

  • In the first 5 observations, total of 21 out of 25 points, hence the mean for these observations is \frac{21}{25} = 0.84.
  • In the next n observations, mean of 1.

Hence, the mean is:

M = \frac{0.84(5) + n}{5 + n} = \frac{4.2 + n}{5 + n}

We want the mean to be of 0.9, thus:

M = 0.9

\frac{4.2 + n}{5 + n} = 0.9

4.2 + n = 0.9n + 4.5

0.1n = 0.3

n = \frac{0.3}{0.1}

n = 3

3 more testes are need, each worth 5 points, hence, 15 more points are needed to bring up his average up to 90%.

A similar problem is given at brainly.com/question/25323941

6 0
2 years ago
What is the volume of a tuna can if the diameter is 13cm and the height is 5cm ?
zloy xaker [14]
The volume of the tuna can is 663.66 cm^3.

Hope that helps!
7 0
3 years ago
1/2 (16x + 20) <br> Need help
KATRIN_1 [288]

Answer: let's say x = 1

16 x 1 =16

16+20=36

36x1/2=18

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
7x to the power of 2 is a what is it<br>a) monomial<br>b) binomial<br>c) Trinomial​
Sedaia [141]
You can use the prefixes to figure this out:
Mono: one
Bi: two
Tri: three

So, because there is only one term, it is a monomial.
4 0
2 years ago
Which is the MOST precise measurement this ruler can give for the green strip of paper? A) 4.00 inches B) 4.25 inches C) 4.50 in
Alenkinab [10]
The most precise is 4.00 because that is equal to 10.16 cm and that is the most closes to an exact measurment.
3 0
3 years ago
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