All categories

3 years ago

PLEASE HELP!!!PLEASE HELP!!!PLEASE HELP!!!PLEASE HELP!!!PLEASE HELP!!!

Mathematics

1 answer:

Dominik [7]3 years ago

4 0

Answer:

The one at the bottom

Step-by-step explanation:

Plug in the value of x = 3 for every equation

I plugged the value of 3 into this equation:

2(3) +3y = 0

3 + 2y = -1

Let's start with the first line

6 + 3y = 0

-6 -6

3y = -6

3y/3 = -6/3

y = -2

Now let's solve the second line

3 +2y = -1

-3 -3

2y = -4

2y/2 = -4/2

y=-2

Since both equations have the solution y = -2, that means the system of equations is valid when the value of x is 3.

You might be interested in

Can someone help me pls

Vsevolod [243]

A..

NOT YOU COMMENTING ON POST JUST TO GET POINTS....

6 0

3 years ago

Read 2 more answers

HELP! Brainliest to first correct answer with work shown!

juin [17]

Answer:

Step-by-step explanation:

A. f(8) = 11

B. f(x) = 7, so x = 3

7 0

3 years ago

A rectangular pyramid and a rectangular prism are shown below.

maxonik [38]

The volume of the rectangular prism is 36 ft³.

Step-by-step explanation:

Step 1:

The volume of a rectangular prism $= lwh$ ,

The area of the base is length multiplied by the width. So $Area = (l)(w).$

The volume of a rectangular prism = $(area)(h).$

The volume of a rectangular pyramid $= a^{2} \frac{h}{3} .$

Where a is the side length. If the base is a square, the area $= a^{2}$ .

So the volume of a rectangular pyramid $=\frac{1}{3} (area)(h)$ .

So if a rectangular pyramid and a rectangular prism have the same base and height, then

3 times the volume of the rectangular pyramid = The volume of the rectangular prism.

Step 2:

As it is given that the volume of the pyramid is 12 ft³, we can calculate the volume of the prism. As both the shapes have the same height and base,

The volume of the prism = $(12)(3) = 36.$

The volume of the rectangular prism is 36 ft³.

8 0

3 years ago

You want to purchase a new car in 6 years and expect the car to cost $94.000. Your bank offers a plan with a guaranteed APR of 5

ddd [48]

Answer:

Monthly deposit= $1,120.81

Step-by-step explanation:

Giving the following information:

Future value= $94,000

Number of periods= 6*12= 72

i= 0.05/12= 0.0042

<u>To calculate the monthly deposit, we need to use the following formula:</u>

FV= {A*[(1+i)^n-1]}/i

A= annual deposit

Isolating A:

A= (FV*i)/{[(1+i)^n]-1}

A= (94,000*0.0042) / [(1.0042^72) - 1]

A= $1,120.81

6 0

3 years ago

A null and alternative hypothesis are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed

Ghella [55]

Complete question is;

The null and alternative hypotheses are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed.

H0: μ = 4

H1: μ > 4

What type of test is being conducted in this problem? What parameter is being tested?

Answer:

Type of test = right tailed

Parameter being tested = population mean

Step-by-step explanation:

We are given the null and alternative hypothesis as;

H0: μ = 4

H1: μ > 4

Now, let's define terms;

The right tailed test and the left tailed test are both examples of one-tailed tests. This is because the area where we would reject the null hypothesis is only in one tail. Which means that in the case of left tail, the rejection region will occur only to the left of the graph while for the right tail, the rejection region will occur only to the right of the graph.

Whereas, for two tailed test, the area where we would reject the null hypothesis would not just be in one tail or one side of the graph but could be in either tail or either side of the graph. Hence, the name "two - tail".

Now, applying this to the question, the alternative hypothesis says the mean is greater than 4. On, a graph, an increase in number on the x-axis means going to the right. Thus, it is a right tailed test

Now, the sample being tested is population mean because in statistics, the symbol μ is generally used to denote population mean.

8 0

3 years ago