All categories

3 years ago

Please help..click on picture...I rrally need help

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

8 0

So the students are on 5:6 ratio from volleyball to football, and we know there are 220 students in total.

$\bf \cfrac{volleyball}{football}\qquad 5:6\qquad \cfrac{5}{6}\implies \cfrac{5\cdot \frac{220}{5+6}}{6\cdot \frac{220}{5+6}}\implies \cfrac{5\cdot 20}{6\cdot 20}\implies \cfrac{100}{\stackrel{football}{120}}$

You might be interested in

For problems 1 through 3, please include –

Roman55 [17]

Answer:

Step-by-step explanation:

5 0

3 years ago

How to you Simplify x+4-5x-2?

Korvikt [17]

Answer:

Combine the like terms

-4x+2

Thats it

4 0

3 years ago

Two garden plots are to have the same area. One is square and one is rectangular. The rectangular plot is 2 meters wide and 8 me

Crank

First, let's look at the formulas for the area of square and area of the rectangle.

$A_{square}=a^2$

$A_{rectangle}=a\cdot b$

And what this exercise states is that the areas are the same. So:

$A_{square}=A_{rectangle}\Longrightarrow a^2=a\cdot b$

Now put in the data.

$a^2=2\cdot8$

Solve for $a$ :

$a=\sqrt{2\cdot8}=\sqrt{16}=\boxed{4}$

The side of the square garden plot is 4 meters.

Hope this helps.

r3t40

7 0

2 years ago

A certain standardized test's math scores have a bell-shaped distribution with a mean of 530 and a standard deviation of 119. Co

kumpel [21]

Answer:

a) 68.2%

b) 31.8%

c) 2.3%

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 530

Standard Deviation, σ = 119

We are given that the distribution of math scores is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

a) P(test scores is between 411 and 649)

$P(411 \leq x \leq 649)\\\\= P(\displaystyle\frac{411 - 530}{119} \leq z \leq \displaystyle\frac{649-530}{119})\\\\= P(-1 \leq z \leq 1)\\\\= P(z \leq 1) - P(z < -1)\\= 0.841 - 0.159 = 0.682 = 68.2\%$

b) P(scores is less than 411 or greater than 649)

$P(x < 411 < x, x > 649)\\=1 = P(411 \leq x \leq 649)\\=1 - 0.682\\=0.318 = 31.8\%$

c) P(score greater than 768)

P(x > 768)

$P( x > 768) = P( z > \displaystyle\frac{768 - 530}{119}) = P(z > 2)$

$= 1 - P(z \leq 2)$

Calculation the value from standard normal z table, we have,

$P(x > 768) = 1 -0.977 = 0.023 = 2.3\%$

5 0

3 years ago

The population of at a town has grown 2% each year. In 1998, the population of the town was about 10,000 people. What was the po

Nuetrik [128]

Answer:

10200

Step-by-step explanation:

This is an example of a compound interest. The equation for this problem is 10000*(1+2/100)^n. The n is the year as 1999 is 1 year away from 1998, you just replace n with 1 and you have a simple equation.

7 0

3 years ago