MATHEMATICS MIDDLE SCHOOL

A file server costs $30,000The file server depreciates by 20% if it’s value each year
After three years it’s value is:

A $ 6000
B $ 12,000
C $ 15,360
D $ 19,200
E $ 24,000

Answers

Answer 1
Answer:

Answer:

30,000 - 20% =24,000 year 1

24,000 - 20% =18,000 year 2

18,000 - 20% =12000 year 3

12,000 is your answer B)

Step-by-step explanation:
Answer 2
Answer: It is A 6,000.
I think I’m correct but if I’m not I’m very sorry.

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A dump truck is unloading sand that falls into a conical pile. Find the height of the cone when the diameter of the pile is 16 ft and the volume of the sand is 550 ft3. Round your answer to the nearest tenth.

Answers

Answer:

8.21

Step-by-step explanation:

formula is:

V= 3(volume)/(pie(diameter))

you plug everything in but when you go to plug in your diameter you need to use the radius. the radius is always half of the diameter.

So I have a 80.98 B In my math class and on my test I scored a 100% what grade will I have when the test grade is put in? (test is worth 60% of overall grade) .13 Points!

Answers

Answer:

92.392% is your new grade

Step-by-step explanation:

Find the value of x in the isosceles triangle shown below.

Answers

Answer:

x=8

Step-by-step explanation:

This isosceles triangle is composed of two right triangles with sides 8,√(80) , and y

As we have two sides of a right triangle, we can find the third using the Pythagorean Theorem

(√(80) )^2=8^2+y^2\n\n80=64+y^2\n\ny^2=16\n\ny=4

As this is an isosceles triangle, these two right triangles are equal, this means that x=2y

Therefore, x=2(4)=8

Answer:

x=8

Step-by-step explanation:

What is the solution to the equation?2/3x=10
A. 15
B. 30
C. 6 2/3
D. 6 1/2

Answers

it is A 
23x=10Step 1: Multiply both sides by 3/2.(32)*(23x)=(32)*(10)x=15
Answer:x=15
2/3x = 10
2x = 10 × 3
2x = 30
x = 30/2
x = 15

The answer is: x = 15.

the isosceles triangle has two sides of equal length, a, that sre longer than the length of the base ,b. the equation 2a+b=15.7 can be used to find the sides length. if one of the longer sides is 6.3 centimeters what is the length of the base

Answers

Answer:

base = 3.1 cm

Step-by-step explanation:

b= base

perimeter= p

From the statement we know that p=15.7 cm

moreover:

a=c=6.3 cm

So we have:

15.7=2*a +b

15.7 = 2*6.3 +b

15.7-12.6 = b

b= 3.1 cm = base

Emma is training for a 10 kilometer race. She wants to beat her last 10 kilometer time, which was 1 hour 10 minutes Emmahas already run for 55 minutes. Which inequality can be used to find how much longer she can run and still beat her previous
time? (1 hr = 60 min)
70> -55
70 <-55
70 St+55
70 > I+55

Answers

Answer:

70 > I+55

Step-by-step explanation:

The last inequality expresses better this situations.

Emma wants to beat her last record, which was 70 minutes. So, she needs to run in less than 70 minutes.

However, she already ran 55 minutes, the remaining time would be the variable I, so, the sum of them must be less than 70 minutes. So, there are two options to represent this:

I + 55 < 70 or 70 > I + 55.

Answer:

the answer is 70 greater-than t + 55
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