MATHEMATICS MIDDLE SCHOOL

In a group of 10 students, 7 are 13 years old and 3 are 17 years old. What is the average (arithmetic mean) age of these 10
students?

Answers

Answer 1
Answer: 7.1, or 7 if you have to round it
Answer 2
Answer: the average is 7.1 .

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Jennifer it's two pennies 105 times how many times can expect both going to come up heads

Answers

Jennifer has two pennies. She flips both pennies 105 times each. How many times can she expect both pennies to come up heads simultaneously?

Assuming I have correctly interpreted your question,
The probability both coins come up heads is (1)/(2) * (1)/(2) = (1)/(4)
Thus the expected number of simultaneous heads is 105/4 or 26.25

Julie decided to go on s caking holiday. She rode 67.73 miles on the first day. On the second day she rode 86.48 miles.she wants to cover 200 miles in three day. How far does she need to go

Answers

67.73 first day + 86.48 second day

67.73 + 86.48 = 154.21

Then you subtract the total from the first and second day from 200.

200 - 154.21 = 45.79

So, Julie has to ride 45.79 miles on day 3 to complete the 200 miles.

Hope this helps. :)
Add 67.73 + 86.48. That equals 154.21.

She needs to travel 200 miles, so do 200 - 154.21. 

The answer is 45.79 miles. 

A right isosceles triangle has an angle with measure of 45*. If x represents the measure of the third angle of the triangle, what is x? PLEASE HELP ASAP

Answers

depends on which angle is x because the 2 smaller corner angles equals 45 degrees each which the third equals 90 degrees so it depends on which angle is x
 

Emmett participated in a race. During the race, he ran 5 miles north and then ran 12 miles west. What is the shortest distance that Emmett must travel to return to the starting point?

Answers

I'd suggest you sketch this situation.  If you did, you'd likely see right away that the shortest distance back to the starting point would be the hypotenuse of the right triangle whose legs are of lengths 5 miles and 12 miles.

Apply the Pythagorean Theorem to solve this.

matt has answered 20 of 25 of the questions on a test. what percentage of the test questions has matt answered

Answers

The percentage of questions Matt has answered is 80 %

What is Percentage?

A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, %

Given data ,

Number of questions Matt has answered = 20

Total number of questions = 25

Let the percentage of questions Matt has answered = x


Number of questions Matt has answered / Total number of questions = x %

Percentage of questions Matt has answered = ( Number of questions Matt has answered / Total number of questions ) / 100

                                                                    x    = ( 20 x 100 ) / 25

                                                                    x    = 20 x 4

                                                                    x    = 80 %

Hence, the percentage of questions Matt has answered is 80 %

To learn more about percentage click :
brainly.com/question/12861068

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He has answered 4/5 of the question . 4/5 is equal to 20/25

How do you do square feet of outdoor carpet with holes in it?

Answers


Find the length and width of the carpet, and multiply the two numbers together. Depending on the size of the holes, you can just round the square footage to what you came up with before. If the holes are significantly sized, measure from one side of the hole to the other to find the holes diameter. Divide the diameter in half to find the radius, and square it. (To square it is multiplying it by itself.) Multiply the radius squared by 3.14. Repeat this on every hole, and subtract it from the square footage of the blanket if it didn't have the holes.
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