3 years ago

100 points if you can solve this for me

Mathematics

1 answer:

Amanda [17]3 years ago

8 0

Answer:

5 feet

Step-by-step explanation:

i know it is, i'm a straight A student in math :D

i just don't know how to explain-

You might be interested in

All pictures are below please help Sandi had the following problem on her math test: . She showed her work on the test as follow

Lunna [17]

Answer:

Step-by-step explanation:

6×4 +2 :2 - 7

24 +1 - 7

25 - 7

1 step 6×4

2step 2:2

3step 24 +1

4step 25 - 7

8 0

3 years ago

A sample of 2,500 people was asked how many cups of coffee they drink in the morning. You are given the following sample informa

Misha Larkins [42]

Answer: V(X) = 0.96

Step-by-step explanation: <u>Variance</u> is defined as the average of the squared difference from the sample or population mean.

For a discrete frequency distribution is calculated following the steps:

1) Determine expected value or mean:

$E(X)=\frac{\Sigma xf}{\Sigma f}$

$E(X)=\frac{0(700)+1(900)+2(600)+3(300)}{2500}$

E(X) = 1.2

2) Multiply frequency and the squared difference of x and expected value:

$f(x-E(X))^{2}$

$700(0-1.2)^{2}=1008\\900(1-1.2)^{2} = 36\\600(2-1.2)^{2} = 384\\300(3-1.2)^{2} = 972$

3) Add them:

$\Sigma [f(x-E(X))^{2}]$ = 1008 + 36 + 384 + 972 = 2400

4) Divide the sum per frequency total:

$V(X)=\frac{\Sigma [f(x-E(X))^{2}]}{\Sigma f}$

$V(X)=\frac{2400}{2500}$

V(X) = 0.96

The variance of the number of cups of coffee is <u>0.96</u>.

7 0

3 years ago

A bottle contains 2 liters of water. The bottle leaks 80 milliliters of water every 3 minutes. Will the bottle be empty in 1 hou

MaRussiya [10]

Answer:

Step-by-step explanation:

2 liters = 2,000

80/3 = 26.6

the bottle leaks 26.6 milliliters in a min

26.6 * 60 = 1596

1596 / 1000 = 1.596 ( to convert to liters)

the bottle will leak 1.596 an hour

6 0

3 years ago

Simplify the expression:

olga55 [171]

Answer:

The correct answer is 20x-1

5 0

3 years ago

Your 80 year-old uncle goes to the doctor and says he has a positive test for prostate cancer. He comes to you and says, "You ar

katovenus [111]

Cheese burger was alright

7 0

3 years ago