MATHEMATICS HIGH SCHOOL

A students' choir contains 25 children and only 5 of them play the piano. If a child is selected at random, what is the probability that the child DOES NOT play the piano? Select all the right answers.

Answers

Answer 1

Answer:

Answer:

probability that the child DOES NOT play the piano

$P(E^(-)) =(4)/(5)$

Step-by-step explanation:

A students' choir contains 25 children

n(S) =25

The number of students play the piano =5

Let 'E' be the event of the child play the piano so n(E) =5

The probability of that the child play the piano

$P(E) = (n(E))/(n(S))$

$P(E) = (5)/(25)= (1)/(5)$

Let 'E⁻ be the event of the child play does not play the piano

$P(E^(-)) = 1- P(E)$

$P(E^(-)) = 1- (1)/(5) =(4)/(5)$

Conclusion:-

probability that the child DOES NOT play the piano

$P(E^(-)) =(4)/(5)$

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If you triple 4 and subtract 2 each day, how many days until you have zero

Answers

Triple 4 and subtract 2 each day
Find the number of days to be able to reach zero
1st day = 3(4) – 2
=> 12 - 2
=> 10
2nd day
=> 10 - 2
=> 8
3rd day
=> 8 – 2
=> 6
4th day
=> 6 – 2
=> 4
5th day
=> 4 – 2
=> 2
6th day
=> 2 – 2
=0

In 6th day, you’ll be able to get the amount of zero by subtracting 3(4) by 2.

You plan to buy $12,000 in computers at a local chain store. There are two stores located about the same distance from your office but in different cities with different tax rates. One city has a tax rate of 7% and the other has a tax rate of 8.5%.What percent can you save by going with the lower tax rate?

Answers

We are given two stores to select and this stores are located in the same distance but of different cities of different tax rates. One city has a tax rate of 7% and the other city has a 8.5%. in order to save, you need to choose a lower tax rate which is 7%. This saves you 1.5% as compared 8.5% of other city

Answer:

The percentage saved is 1.5% .

Step-by-step explanation:

As given

You plan to buy $12,000 in computers at a local chain store. There are two stores located about the same distance from your office but in different cities with different tax rates.

One city has a tax rate of 7% and the other has a tax rate of 8.5%.

7% is written in the decimal form .

$= (7)/(100)$

= 0.07

Tax price at 7% tax rate = 0.07 × Cost of the computer

= 0.07 × 12000

= $ 840

8.5% is written in the decimal form .

$= (8.5)/(100)$

= 0.085

Tax price with 8.5% tax rate = 0.085 × Cost of the computer

= 0.085 × 12000

= 1020

Change in the tax rate = Tax price with 8.5% tax rate - Tax price at 7% tax rate.

= 1020 - 840

= $180

$Pecentage\ saved = (Change\ in\ the\ tax\ rate* 100)/(Cost\ of\ the\ computers)$

$Pecentage\ saved = (180* 100)/(12000)$

$Pecentage\ saved = (18000)/(12000)$

Percentage saved = 1.5%

Therefore the percentage saved is 1.5% .

Each face of cabinet 413s is in the shape of a rectangle. What is the volume of model 413s in cubic feet

Answers

Hopefully this is the question you are talking about!
They want us to find the volume of model 413S in ft³
This isnt tough!
change the side measurements from Inches to Feet
12 in = 1 ft

so therefore:
24 in = 2 ft
72 in = 6 ft
18 in = 1.5 ft

Volume of a cuboid is:
Area of base × height of cuboid
V = 2 ft × 6 ft ×1.5 ft
= 18 ft³
Volume of the cabinet (Model 413S) is 18 ft³

Each side of the model of 413s is rectangular shaped.
So, by this statement we got to know that the model is in cuboid shape.
Hence, its volume will be (length×width×height) cubic feet.

Tyes math book is 2 3/4 inches thick her history book 1 3/8 inches thick how much thicker is her math book than her history book?

Answers

Answer:

1 3/8

Step-by-step explanation:

Subtract the fractions, but you need to find common denominators first. Since 4 can go into 8, 8 is the common denominator. Multiply 2 3/4 by 2/2

2 3/4 × 2/2 = 2 6/8

Now subtract.

2 6/8 - 1 3/8 = 1 3/8

Solve:-

7^5

Thanks!!!!!!!!!!!!!

Answers

These are exponents. To solve an exponent you need to multiply the base it self how many times its says in the power.

a²

a = base
2 = power

7^5 = 7 × 7 × 7 × 7 × 7 = 16807
7^5 = 16807

Solutions

7^5

=7 x 7 x 7 x 7 x 7

=16807

Can someone please help I really need help

Answers

Answer:

see below

Step-by-step explanation:

Each point and line moves to half its previous distance from the center of dilation, the origin. So, the point (-10, -10) moves to (1/2)(-10, -10) = (-5, -5). The dilation factor applies in the same way to other coordinates.

I find it easy enough just to spot the points on the graph and draw the lines between them.

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