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2 years ago

Answer for the question

Mathematics

1 answer:

kupik [55]2 years ago

5 0

Answer:

it is the domain

Step-by-step explanation:

because if you put 5x on the other side it will be a -5

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What is the equation of the line that passes through the point (-2,0) and has a slope of -2?

prohojiy [21]

Answer:

so the equation is y=-2x-4

Step-by-step explanation:

sub the points in the equation to find the y-intercept

y=x(-2)+b

0=-2(-2)+b

0=4+b

0-4=b

-4=b

6 0

3 years ago

What is the answer to this question

Crank

The answer is “c” because the 6% of 5300 is 318 which they gain each year so multiply. 318 x 18 = 5724 + 5300 that they already have is equal to 11,024

4 0

2 years ago

The symbol used to show that you are taking a root of something

konstantin123 [22]

the little check with the dash on top

8 0

2 years ago

Read 2 more answers

If a vertical pole 30 ft tall casts a shadow 8ft long, how long would the shadow of 40-ft pole be at the same time and place

TEA [102]

Since it as at the same time and place.

Let x be the length of the shadow of the 40-ft pole.

The ratio from 30 and 8 would have to be the same as 40 and x.

30:8 = 40:x

30/8 = 40/x Cross multiply

30x = 40*8

x = 40*8 / 30 = 32/3 = 10.67

Length of shadow for 40ft is 10.67 ft.

5 0

3 years ago

Recent survey data indicated that 14.2% of adults between the ages of 25 and 34 live with their parents. Their parents must have

astraxan [27]

Answer:

38.76% probability that between 13 and 17 of these young adults lived with their parents

Step-by-step explanation:

I am going to use the normal approxiation to the binomial to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

$E(X) = np$

The standard deviation of the binomial distribution is:

$\sqrt{V(X)} = \sqrt{np(1-p)}$

Normal probability distribution

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

When we are approximating a binomial distribution to a normal one, we have that $\mu = E(X)$ , $\sigma = \sqrt{V(X)}$ .

In this problem, we have that:

$p = 0.142, n = 125$

$\mu = E(X) = np = 125*0.142 = 17.75$

$\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{125*0.142*0.858} = 3.9025$

What is the probability that between 13 and 17 of these young adults lived with their parents?

Using continuity correction, this is $P(13 - 0.5 \leq X \leq 17 + 0.5) = P(12.5 \leq 17.5)$ , which is the pvalue of Z when X = 17.5 subtracted by the pvalue of Z when X = 12.5. So