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3 years ago

Pls help i’m on the verge of tears

Mathematics

1 answer:

icang [17]3 years ago

4 0

Answer:

Aw don't cry <3

It would be easier if you use a website with a graph! There is a website called "desmos" and if you search up desmos graphing calculator you will find it. Type in the points in the website, and it would add in the points for you.

but here is a piece of key information:

Make $\frac{3}{4}$ into a decimal. That would be 0.75.

Since it says "of the way from", count the boxes in the graph from each point.

Hope this helps! ^.^

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Someone help plz make sure it’s right plz will mark brainiest if it is:)

Lady_Fox [76]

The 4th one is correct

4 0

3 years ago

Read 2 more answers

Identify the percent change: 14 dollars to 10 dollars

Xelga [282]

Hello from MrBillDoesMath!

Answer:

- 28.6 % (approx)

Discussion:

14 -> 10 dollars is a drop of (14-10) or 4 dollars. The percent drop is given by

(14-10)/14 =

4/14 =

2/7 =

28.6% (approx)

Since this is a drop the percent is actually negative = - 28.6%

Thank you,

MrB

7 0

4 years ago

Salma bought 4 CDs that were each the same price. Including sales tax, she pald a total of $70.40. Each CD had a tax of $1.20. W

postnew [5]

Answer:

$16.40 per CD before tax

Step-by-step explanation:

4 CDs cost $70.40

70.40 / 4 = 17.60 (this includes the tax)

Remove the tax

17.60 - 1.20 = $16.40 per CD before tax

6 0

3 years ago

Five males with an X-linked genetic disorder have one child each. The random variable x is the number of children among the fiv

Nesterboy [21]

Answer:

a) It is probability distribution

b) mean = 2.5

c) Standard Deviation = 1.11

Step-by-step explanation:

We are given the following in the question:

x 0 1 2 3 4 5

P(x) 0.033 0.149 0.318 0.318 0.149 0.033

Probability distribution:

$\displaystyle\sum P_i(x_i) = 0.033+ 0.149 +0.318+ 0.318+ 0.149 +0.033 = 1$

Since, the summation of all the probabilities is 1 and each value of probability is between 0 and 1, the given is a probability distribution.

Mean of probability distribution:

$E(x) = \displaystyle\sumx_iP(x_i)\\E(x) = 0(0.033)+ 1(0.149)+2(0.318)+3(0.318) +4(0.149) + 5(0.033)\\E(x) = 2.5$

Thus, the mean of distribution is 2.5

Standard deviation of probability distribution:

$E(x^2) = 0^2(0.033)+ 1^2(0.149)+2^2(0.318)+3^2(0.318) +4^2(0.149) + 5^2(0.033)\\E(x^2) = 7.492\\\sigma^2 = E(x^2) - (E(x))^2\\\sigma^2 = 7.492 - (2.5)^2 = 1.242\\\sigma= \sqrt{1.242} = 1.11$