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3 years ago

12

A gym membership costs $25 to join and $15 each month. write and use an algebraic expression to find the cost of the gym members

hip for 6 months.

1 answer:

anastassius [24]3 years ago

4 0

Y = 15(6) + 25

If you need me to elaborate on that please ask! Here to help :)

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There are 20 students in the high school glee club. They need to pick four students to serve as

gayaneshka [121]

Answer:

4845 ways

Step-by-step explanation:

To solve this problem we use the formula of combinations

$nCr=\frac{n!}{r!(n-r)!}$

Where n is the total number of students that can be chosen and you choose r from them.

So

$n = 20\\r = 4$

Note that in this case the order in which the 4 students are chosen does not matter.

Then

$20C4=\frac{20!}{4!(20-4)!}$

$20C4=\frac{20!}{4!*16!}=4845\ ways$

6 0

3 years ago

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Karen and James both had 30 stocking stuffer items on their shopping list. After black Friday shopping Karen had finished 35% of

mihalych1998 [28]

Answer: 7.5 items

Step-by-step explanation:

Both Karen and James had 30 stocking items.

Karen bought 35% of her items;

= 35% * 30

= 10.5 items

James has bought 60%;

= 60% * 30

= 18 items

= 18 - 10.5

= 7.5 items

6 0

3 years ago

No files!!! <br> Will give brainliest and please don’t guess

ohaa [14]

Answer:

i think its 54. i might be incorrect.

Step-by-step explanation:

7 0

3 years ago

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For X a binomial random variable with n=5 and p=1/4, answer the following

mash [69]

Recall that for $X\sim\mathrm{Bin}(n,p)$ , i.e. a random variable $X$ following a binomial distribution over $n$ trials and with probability parameter $p$ ,

$\mathbb P(X=x)=f_X(x)=\begin{cases}\dbinom nx p^x(1-p)^{n-x}&\text{for }x\in\{0,1,\ldots,n\}\\\\0&\text{otherwise}\end{cases}$

So you have

$\mathbb P(X=2)=\dbinom52\left(\dfrac14\right)^2\left(1-\dfrac34\right)^{5-2}=\dfrac{135}{512}\approx0.26$

$\mathbb P(2\le X\le4)=\displaystyle\sum_{x=2}^4\mathbb P(X=x)$
$=\dbinom52\left(\dfrac14\right)^2\left(1-\dfrac14\right)^{5-2}+\dbinom52\left(\dfrac14\right)^3\left(1-\dfrac14\right)^{5-3}+\dbinom52\left(\dfrac14\right)^4\left(1-\dfrac14\right)^{5-4}$
$=\dfrac{375}{1024}\approx0.37$

The expected value of $X\sim\mathrm{Bin}(n,p)$ is simply $np$ , while the standard deviation is $\sqrt{np(1-p)}$ . In this case, they are $\dfrac54=1.25$ and $\sqrt{\dfrac{15}{16}}\approx0.97$ , respectively.

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3 years ago

What number is39% of 120

noname [10]

46.8 is 39% of 120. Hope this helped you!

4 0

3 years ago

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