MATHEMATICS HIGH SCHOOL

Jacob trims trees and mows lawns during the summer months he earns 50$ per lawn and 120$ per tree he wants to purchase a car for 4,500if Jacob plans to mow 45 lawns this summer how many trees must he trim to earn at least 4,500

Answers

Answer 1

Answer:

Answer:

at least 19

Step-by-step explanation:

Let t represent the number of trees Jacob needs to trim. He wants ...

50(45) +120t ≥ 4500

120t ≥ 2250 . . . . . . . . . subtract 2250

t ≥ 18.75

Jacob must trim at least 19 trees to earn at least $4500.

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the distribution of daily sleep duration among college students is normal with a mean of 8.13 and standard deviation of 1.87. suppose you plan to take an simple random sample (srs) of size 64, what is the mean of the sampling distribution of mean sleep duration time for college students? the distribution of daily sleep duration among college students is normal with a mean of 8.13 and standard deviation of 1.87. suppose you plan to take an simple random sample (srs) of size 64, what is the mean of the sampling distribution of mean sleep duration time for college students? 0 1.355 1.87 8.13

Answers

The mean of the sampling distribution of mean sleep duration time for college students is 8.13.

The sampling distribution of the mean is a probability distribution that shows all possible sample means that can be obtained from a population. When we take a sample of size n from a population, calculate the mean of that sample, and repeat this process many times, we obtain a sampling distribution of the mean. The mean of this distribution is called the expected value of the sample mean, and it represents the average value of all possible sample means.

In this question, the population mean and standard deviation of sleep duration among college students are given as 8.13 and 1.87, respectively. We are asked to find the mean of the sampling distribution of the mean for a simple random sample of size 64.

The mean of the sampling distribution of the mean is equal to the population mean, which is 8.13 in this case. This means that if we take many simple random samples of size 64 from this population, calculate the mean of each sample, and plot these means on a histogram, the distribution of these means will be centered around 8.13.

The mean of the sampling distribution of the mean sleep duration time for college students can be calculated using the formula:

Sampling distribution mean = Population mean = 8.13

Therefore, the mean of the sampling distribution of mean sleep duration time for college students is 8.13.

Learn more about "mean ":

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A+5 a+5 a

please help me write it in simplest form

Answers

Answer:

Therefore, the simplest form of the expression "A + 5a + 5a" is "A + 10a"

Step-by-step explanation:

To simplify the expression "A + 5a + 5a" in its simplest form, we can combine like terms. "A" and "5a" are like terms because they both have the variable "a" raised to the power of 1. So, combining "A" and "5a" gives us: A + 5a + 5a = A + 10a

Dx+hy=j,forx x= thanx for any and all help

Answers

$dx+hy=j \n \n dx = j-hy \ \ / : \ d \n \nd\neq 0\n \nx=(j-hy )/(d)$

Dx + hy = j

Dx = j - hy

x= (j - hy) / D

What is the difference between constructing and drawing geometric figures? Give a real-world example of each.

Answers

The difference between constructing and drawing geometric figures is that when constructing a geometric figure, you use compass, protractor, ruler, or any scale with accurate measurement while when drawing geometric figures, you just draw with free-hand. It is not exact in measures.

The difference between constructing and drawing geometric figures is as follows:

To construct geometric figure you use many tools like protractor, compass, ruler, scale, square, among others. So you need an accurate representation of the geometric figure. On the other hand, to draw a geometric figure you only need a pencil to do that. You don't need an accurate representation of the geometric figure.

A real-world example of each:

Think about an civil engineer who is constructing a building. He would need many tools to do that. In fact, he would need an building which is an accurate representation of the drawings he made using a software. He would need the accurate measurements and the correct location of each characteristic points of the building. So, this is the construction. On the other hand, when starting with the project, the civil engineer maybe took a paper and began drawing an sketch of his building, he only needed a pencil to do that, so this is the drawing made by hand.

Molly is on a game show. To win $1,000,000, she must answer this question: What key features are necessary—and how are the features used—to create the sketch of a polynomial function? What is Molly's winning answer? Explain in complete sentences.

Answers

A polynomial function refers to a function expressed by a polynomial, with only positive integer (non-fraction, non roots) values for the exponents, such as:

$(a_(1))^(n) + (a_(2))^(n-1) + (a_(3))^(n-2) +...+ a_(n)$

Remember that $(1)/(x)$ can be written as ,

The sum of two integers is -1. the product of the integers is -72 find the integers.

Answers

$\left\{\begin{array}{ccc}x+y=-1\nx\ *\ y=-72\end{array}\right\n\left\{\begin{array}{ccc}x=-y-1\nx\ *\ y=-72\end{array}\right\n\nsunbstitute:\n\n(-y-1)y=-72\n-y^3-y+72=0\n\na=-1;\ b=-1;\ c=72\n\Delta=b^2-4ac\to\Delta=(-1)^2-4\cdot(-1)\cdot72=1+288=289\n\ny_1=(-b-\sqrt\Delta)/(2a)\to y_1=(1-√(289))/(2\cdot(-1))=(1-17)/(-2)=(-16)/(-2)=8\n\ny_2=(-b+\sqrt\Delta)/(2a)\to y_2=(1+√(289))/(2\cdot(-1))=(1+17)/(-2)=(18)/(-2)=-9$

$if\ y=8\ then\ x=-8-1=-9\n\nif\ y=-9\ then\ x=-(-9)-1=9-1=8\n\nAnswer:8\ and\ -9.$

Answer:

the answer is 8 and -9

Step-by-step explanation:

hope this helps

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