3 years ago

I need help!!! Please figure it out and type it out.

Mathematics

1 answer:

rodikova [14]3 years ago

7 0

Answer:

the mean number is 2.7

Step-by-step explanation:

if you add up the frequency of books then divide by 20 you get 2.7

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PLEASE HELP ME WITH THESE TWO!!! ILL MARK BRAIN-LIST!!!

Snezhnost [94]

Step-by-step explanation:

πrxrxh

3.14 x 3.5 x 3.5 x 10 = 384.65

3.14 x 2 x 2 x 6 = 75.36

7 0

3 years ago

Mary ate 5 slices of pie. Arther ate 2 slices. If Mary ate 5/10 of the pie and all the slices werethe same size, what fraction o

viktelen [127]

5/10 +2/10= 7/10 10/10-7/10= 3/10
Your answer is 3/10

4 0

4 years ago

Read 2 more answers

An excursion party had $2.00 to pay in total, but before the bill was paid 10 people from the party went away, and those that re

KatRina [158]

Answer:

20 people

Step-by-step explanation:

Let x be the number of people initially. We can find the amount each of them has to pay at first

2 / x

But when 10 people walk away, the remaining (x - 10) has to pay 10 cents more to get the same total of $2. This would means

$(\frac{2}{x} + 0.1)(x-10) = 2$

From here we can perform cross multiplication

$2 - 20/x + 0.1x - 1 = 2$

$0.1x - 20/x - 1 = 0$

Multiply both sides by 10x:

$x^2 -10x - 200 = 0$

$x= \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

$x= \frac{10\pm \sqrt{(-10)^2 - 4*(1)*(-200)}}{2*(1)}$

$x= \frac{10\pm30}{2}$

x = 20 or x = -10

Since x can only be positive we will pick x = 20

3 0

3 years ago

(a) Write a system of linear equations that would represent the amount of money (y) spent or made from producing and selling x n

zubka84 [21]

Answer:

nnnoooo

Step-by-step explanation:

7 0

3 years ago

Sarah is going to a higher a DJ for her party. DJ iceman charges an initial fee of $100 in addition to $21 per hour. DJ chomp ch

nalin [4]

First you make an equation and establish a variable.
x=amount of hours the DJs will charge the same amount
100+21x=150+15x
Now you solve for x and that will get you your answer.
100+21x=150+15x
-21x -21x
100=150-6x
-150 -150
-50=-6x
8.3333...=x
You can round the answer to $8.33
Hope I helped.

6 0

4 years ago