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3 years ago

BRAINLYEST TO WHOEVER ANSWERS FAST

Mathematics

1 answer:

inn [45]3 years ago

6 0

It is E because I did the test and it was easy so txt me if you need help

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"Time headway" in traffic flow is the elapsed time between the time that one car finishes passing a fixed point and the instant

marysya [2.9K]

Answer:

Detailed explanation of the answer is given in the attached files. Please have a look.

Step-by-step explanation:

8 0

4 years ago

The ratio of green pepper plants to red pepper plants in Joe's garden is 2:7. If Joe has 20 more red pepper plants than green pe

Marta_Voda [28]

I found that Joe has 28 red pepper plants and 8 green pepper plants.

to find this, I first set up a proportion:
7/2 = (20+x)/x

then you cross multiply giving you:
7x = 40 + 2x

Subtract 2x from both sides:
5x = 40

solve for x:
x = 8 (which is the amount of green pepper plants)

to find how many red pepper plants he has, plug in x for (20 + x) giving you 28 red pepper plants

Hope I helped :)

5 0

3 years ago

The ages of adults in a certain community follow a normal distribution with mean 38 and standard deviation 6. The random variabl

nataly862011 [7]

Answer:

a = 33.32

Step-by-step explanation:

Problems of normally distributed samples are 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.

In this problem, we have that:

$\mu = 38, \sigma = 6$

P(32 < x < a) = .0590

This is the pvalue of Z when X = a subtracted by the pvalue of Z when X = 32.

X = 32

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

$Z = \frac{32 - 38}{6}$

$Z = -1$

$Z = -1$ has a pvalue of 0.1587

X = a

p - 0.1587 = 0.0590

p = 0.0590 + 0.1587

p = 0.2177

So when X = a, Z has a pvalue of 0.2177. So when X = a, Z = -0.78.

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

$-0.78 = \frac{X - 38}{6}$

$X - 38 = -0.78*6$

$X = 33.32$

So a = 33.32

3 0

3 years ago

0.121122111222... if the pattern continues, is this a repeating decimal? why or why not?

hammer [34]

First we observe pattern here. The pattern is one number "1" and one number "2" than two numbers "1" and two numbers "2" and so on. Every next array of numbers 1 and 2 will have one extra member.

Because of this, 0.121122111222... isn't repeating decimal. Repeating decimal has some number of decimals that keep repeating. For example if we had:
0.121122 121122 121122 ... this would be repeating decimal because 121122 segment keeps repeating.

In your task you can't find a segment that keeps repeating.

3 0

3 years ago

Change the following statements into coordinate points

MAVERICK [17]

F(x) would be x value
Solution would be y value

a. (-1,1)
b. (2,7)
c. (1,-1)
c. (2,0)

3 0

3 years ago