Whats 23 X 3 need to know now teacher is getting me to the answer help plzzzzzzz

Can anyone help me with both problems please?

Eva8 [605]

Answer:

1.y=2x+7

2.y=1/2x+2

Step-by-step explanation:

Graph 1-

The slope-intercept form is y=mx+b

b= y-intercept which in graph 1 is 7

so y=mx+7

in order to find m you use the y2-y1/x2-x1 equation.

This means find two coordinates on the graph such as (0,7) and (-1,5).

Now find y2:5

y1:7

x2:-1

x1:0

y2-y1= 5-7=-2

x2-x1= -1

That gives you -2/-1 which you then simplify to = 2

So the graph would be y=2x+7

Graph 2:

You will do the same steps: Find where the line passes through y on a graph, which will be y=2.

b=2

y=mx+2

then find two coordinates, (0,2)(2,3)

y2=3

y1=2

x2=2

x1=0

y2-y1=3-2=1

x2-x1=2-0=2

The slope of the graph which is m= 1/2

y=1/2x+2

8 0

2 years ago

Describe the transformations that map A onto the point A”.

dexar [7]

Answer:

A

Step-by-step explanation:

(x, y) -----> (x + 4, y - 1)

Adding 4 to the x means you move right 4. Subtracting 1 from the y means you move down one.

The next transformation (-(x + 4), y - 1)

If you look at the x coordinate and the transformation that is being applied

(-(x+4) that negative means you are taking the opposite of the x coordinate.

When you take the opposite of the x coordinate, it means you reflect it over the y axis.

6 0

2 years ago

What is the root of the polynomial equation x (x minus 2) (x + 3) = 18? Use a graphing calculator and a system of equations. –3

Serga [27]

Answer:

D) 3

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

Solve 18 > 12 + x. Graph the solution.

telo118 [61]

Answer:

I have attached a screenshot of your inequality graphed. Credit to Desmos.

3 0

2 years ago

Two different box-filling machines are used to fill

lorasvet [3.4K]

Answer:

a) 0.1984

b) No. Is not too small to support the conjecture with confidence

Step-by-step explanation:

1) Previous concepts and data given

The sample sizes are $n_A=n_B=36$

We can find the distribution for $\hat X_A -\hat X_B$ , and since is a sampling distribution and $\hat X_A$ and $\hat X_B$ follows normal distributions then $\hat X_A -\hat X_B$ follows a normal distribution too.

The mean and the deviation for $\hat X_A -\hat X_B$ is given by:

$\mu_{\hat X_A}-\mu_{\hat X_B}=\mu_A -\mu_B$ and since $\mu_A =\mu_B$ then $\mu_A -\mu_B=0$

$\sigma_{\hat X_A -\hat X_B}=\sqrt{\frac{\sigma^2_A}{n_A}+\frac{\sigma^2_B}{n_B}}$

Since both A and B have the same deviation and variance then:

$\sigma_{\hat X_A -\hat X_B}=\sqrt{\frac{\sigma^2}{n_A}+\frac{\sigma^2}{n_B}}=\sqrt{\frac{1}{36}+\frac{1}{36}}=\sqrt{\frac{1}{18}}=0.236$

2) Part a

We want to find:

$P(\hat X_A -\hat X_B \geqslant 0.2)$

The random variable

$Z=\frac{\hat X_A -\hat X_B -\mu_{\hat X_A}-\mu_{\hat X_B}}{\sigma_{\hat X_A -\hat X_B}}$ follows a normal distribution with mean 0 and deviation 1 we can use this:

$P(\hat X_A -\hat X_B \geqslant 0.2)=P(\frac{\hat X_A -\hat X_B -\mu_{\hat X_A}-\mu_{\hat X_B}}{\sigma_{\hat X_A -\hat X_B}}\geqslant \frac{0.2-\mu_{\hat X_A -\hat X_B}}{\sigma_{\hat X_A -\hat X_B}})$

$P(\hat X_A -\hat X_B \geqslant 0.2)=P(Z\geqslant \frac{0.2-0}{0.236})=1-P(Z$

3) Part b

From part a we found that we have a change of 19.84% that the experiment would give a difference between the sample means which is greater or equal than 0.2

Analyzing the probability obtained we can say that is not too small to support the conjecture with confidence that the population means for the two machines are different

4 0

2 years ago