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3 years ago

Pls someone help me I don't understand!! if correct I'll make Brainliest!!!!

Mathematics

1 answer:

Georgia [21]3 years ago

5 0

Every hour there is 15 gallons of water added to the tank. In 10 hours there will be 150 gallons of water in the tank.

Hope this helps :)

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Help Me I am really confused on how to solve this math problem

rjkz [21]

Answer:

e(x) = d(x)+4

Step-by-step explanation:

d(x) = ( x +2)^2 -4

Add 4 to each side

d(x) +4 = ( x +2)^2 -4+4

d(x) +4 = ( x +2)^2

We know that (x=2)^2 = e(x)

d(x) +4 = e(x)

e(x) = d(x)+4

4 0

3 years ago

You roll a six-sided die twice. What is the probability of rolling an even number and then an odd number?

nlexa [21]

Answer:

C) 1/4

Step-by-step explanation:

Because you have six-sided dice there are 3 odd numbers and 3 even numbers. That means you have a 1/2 for getting either a odd or even number. So we would add 1/2 + 1/2 because you are rolling two times and both have a 1/2 of getting either a odd or even number. 1/2+1/2 = 1./4 which would be your answer.

Hope this helped! Have a good day/night and good luck! Stay safe!!

6 0

4 years ago

The angle measurements in the diagram are represented by the following expressions. A=5x-5 B=3x+13

weeeeeb [17]

Answer:

Step-by-step explanation: 5x-5=3x+13---> 5x-3x=13+5---> 2x=13+5---- 2x=18----> x=9 hope it helps

3 0

3 years ago

Luke is going to a carnival that has games and rides. Each game costs $3.50 and each ride costs $4.50. How much would Luke have

Svetach [21]

Answer:

28$ games and 45$ for rides so 73$

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

According to a 2009 Reader's Digest article, people throw away approximately 11% of what they buy at the grocery store. Assume t

expeople1 [14]

Answer:

0.14% probability that the sample proportion exceeds 0.2

Step-by-step explanation:

I am going to use the binomial approximation to the normal 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 $\mu = E(X)$ , $\sigma = \sqrt{V(X)}$ .