25 points for this please help with step by step

Mathematics

2 answers:

Svetllana [295]3 years ago

8 0

a) 20.9

The mean is calculated by adding up the scores and dividing the total by the number of scores, it is also called the average.

First, we can count and see there are 11 players (makes sense for a football team). Adding up the ages gives us 19 + 19 + 20 + 20 + 20 + 21 + 22 + 22 + 22 + 22 + 23 = 230. Divide by 11 and we get a mean of of about 20.9!

b) 30

To figure this out, we will set up an equation that looks like this:

$\frac{19 + 19 + 20 + 20 + 20 + 21 + 22 + 22 + 22 + 22 + 23+x}{12} =22$

And now we will solve:

[multiply both sides by 12] 230 + x = 264

[subtract 130 from both sides] x = 30

So the age of the new player should be 30!

Have a nice day!

I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Lemur [1.5K]3 years ago

3 0

Answer:

For A its 21

Step-by-step explanation:

add all the numbers which is 105, then divide it by 5 because thats how many numbers we have. the answer is 21

You might be interested in

20. what is the area of the figure.

AlekseyPX

Comment
In a 45 - 45 - 90 triangle the two smaller sides are =. So when you use
a^2 + b^2 = c^2, you need a and b both to find the area.

So call both of them = b^2.

Equation and solution
a^2 + b^2 = c^2
b^2 + b^2 = c^2
2b^2 = c^2
c = 24
b = ???

2 b^2 = 24^2
2 b^2 = 576 Divide by 2
b^2 = 288 I'm going to leave this as it is for the moment. You'll see what in a second.

Area of a triangle
Area of a triangle = 1/2 h * b
But the height and base are the 2 smaller equal sides of a 45_45_90 triangle
so h = b
base = b

Area of a triangle = 1/2 b^2 The equalities above tell you that. h and b of the triangle are equal.

Area = 1/2 288 feet^2
Area = 144 feet^2

3 0

3 years ago

Her bank balance was -$90. she deposited $100 in her bank account on wednesday. what is her balance at the end of the day on wed

Nastasia [14]

We just need to add the 2 numbers together to find the balance at the end of Wednesday.

-90+100
=10

She had $10 at the end of Wednesday in her bank account.

7 0

3 years ago

Read 2 more answers

45% of 80.374 is a number between

tatiyna

Answer:

36.1683

Step-by-step explanation:

45*80.374/100=

7 0

3 years ago

Sasha is planning to create a garden with area 30 m2. She could use a