(-3x2 + 4x + 2) + (7x - 5)

Answer:

8x-20

Step-by-step explanation:

Use the distributive property. Multiply 4 by 2x. Multiply 4 by -5.

Answer:

111.4

Step-by-step explanation:

trust

Answer:

The answer is "[tex]\bold{r=9, \lambda=\frac{1}{2}\ and \ \ \text{exponential, 9 steps}}[/tex]"

Step-by-step explanation:

In point a:

We are aware of the random gamma variable X:

[tex]\to \mathbb{E} =\frac{r}{\lambda}\\\\\to Std(X) =\frac{\sqrt{r}}{\lambda}\\\\[/tex]

It is given:

[tex]\to \mathbb{E} = 18 \\\\\to std(X)=6[/tex]

[tex]\to 18=\frac{r}{\lambda}\\\\ \to 6=\frac{\sqrt{r}}{\lambda}\\\\[/tex]

Substituting the value:

[tex]\to \frac{\sqrt{r}}{6}=\frac{r}{18}\\\\\to r=9\\\\\to \lambda=\frac{1}{2}\\\\[/tex]

In point b:

When building the Erlang/Gammas distribution, these could reasonably be assumed to become an exponential distribution only with \lambda = 1/2 parameter with one step but to be r = 9 for one step.

Answer:

108 ft²

Step-by-step explanation:

Square: 9^2 = 81

Triangle: 1/2(9)(6) = 27

Total = 81 + 27 = 108

It's 108 ft I'm p sure

Answer:

A.

Step-by-step explanation:

I'm pretty sure that's right.

Answer:

4x^2 + 8x - 20

Step-by-step explanation:

Amir subtracted a quantity

Let quantity = y

... from the polynomial 3x^2+8x−16

y - (3x^2+8x−16)

and produced the expression x^2−4

= x^2−4

What quantity did Amir subtract?

y - (3x^2+8x−16) = x^2−4

Solving for y;

y =  x^2−4 + (3x^2+8x−16)

y = x^2−4 + 3x^2+8x−16

y = 4x^2 + 8x - 20

Quantity subtracted by Amit is [tex]\boldsymbol{2x^2+8x-12}[/tex]

In arithmetic, an expression is a sentence that includes at least two integers (known or unknown) as well as at least [tex]1[/tex] operation.

A quantity is subtracted from the polynomial [tex]3x^2+8x-16[/tex] and the result obtain is the expression [tex]x^2-4[/tex]

Quantity subtracted [tex]=(3x^2+8x-16)-(x^2-4)[/tex]

                                 [tex]=3x^2+8x-16-x^2+4\\=2x^2+8x-12[/tex]

So, quantity subtracted is [tex]\boldsymbol{2x^2+8x-12}[/tex]

Find out more information about expression here:

https://brainly.com/question/13947055?referrer=searchResults

answer:

we reject null and conclude that this manufacturers claim is false

Step-by-step explanation:

p = 30% = 0.30

p^ = 93/150 = 0.62

we state the hypothesis

H0: p = 0.30

h1: p not equal to 0.30

we find the z test stattistics

[tex]z=\frac{p^--p}{\sqrt{\frac{p(1-p)}{n} } }[/tex]

[tex]z=\frac{0.62-0.30}{\sqrt{\frac{0.30(1-0.30)}{150} } }[/tex]

[tex]z=\frac{0.32}{\sqrt{\frac{0.30*0.70}{150} } }[/tex]

[tex]z=\frac{0.32}{0.03741}[/tex]

z = 8.5538

at alpha = 0.05

z-critical = Z₀.₀₅/₂ = Z₀.₀₂₅

= 1.96

we compare z critical with the test statistic

z statistic > z critical so we have to reject H₀ and conclude that the manufacturers claim is not valid at 0.05 level of significance.

Answer:

See Explanation

Step-by-step explanation:

Given

See attachment

Solving (1): What is asked

The requirement of the question is to determine the difference between the amount of sugar used between yesterday and today

Solving (2): The given facts

[tex]Yesterday = \frac{9}{10}kg[/tex]

[tex]Today = \frac{3}{5}kg[/tex]

Solving (3): Operation to be used

We use subtraction operation

Solving (4): The mathematical sentence

[tex]D = Yesterday - Today[/tex]

[tex]D = \frac{9}{10}kg - \frac{3}{5}kg[/tex]

D represents the difference

Solving (5): The solution

[tex]D = \frac{9}{10}kg - \frac{3}{5}kg[/tex]

Take LCM

[tex]D = \frac{9 - 6}{10}kg[/tex]

[tex]D = \frac{3}{10}kg[/tex]

Answer:

6 of his class are girls

Step-by-step explanation:

24/4=6

Answer: y = (16/3)*x - 13.33

Step-by-step explanation:

A linear relationship can be written as:

y = a*x + b

where a is the slope and b is the y-axis intercept.

For a line that passes through the points (x1, y1) and (x2, y2), the slope can be written as:

a = (y2 - y1)/(x2 - x1).

Then for our particular case, we know that the line passes through the points (4, 8) and (1, -8)

Then the slope for this line will be:

a = (8 - (-8))/(4 - 1) = 16/3

Then our line is something like:

y = (16/3)*x + b

We need to find the value of the y-intercept b.

We know that this line passes through the points (4, 8) and (1, -8)

Then we can just replace the values of one of these points in our linear equation, for example, if we se the first one we get:

x = 4 and y = 8

replacing that in our equation we get:

8 = (16/3)*4 + b

8 - (16/3)*4 = b

-13.33 = b

Then the equation for our line is:

y = (16/3)*x - 13.33

Answer:

81986088

its even

Step-by-step explanation:

just look it up on your search bar? Im confused on what your asking. Sorry if  I answered wrong

Answer:

it is either A OR B

Step-by-step explanation:

Answer:

39.2°

Step-by-step explanation:

Vertical angles are always congruent.

Answer:

The angle is 140.8

Step-by-step explanation:

A straight angle is equal to 180°

So 180° minus 39.2° equals the answer

Answer:

x = 20.1 degrees

Step-by-step explanation:

Use the inverse sine function to calculate the angle measure. While the sine function uses the opposite and hypotenuse's angle measures, the inverse sine uses the side lengths of the opposite and hypotenuse.

Using something like desmos, plug in arcsin(11/32) and make sure you have selected degrees instead of radians in the setting to get the correct output.

Note that Inverse sine , cosine, and tangent can be written like arcsin, arccos, arctan or  sin^-1,  cos^-1, tan^-1.

x= 20.1

Answer: 100,000 + 80,000 + 6,000 + 200 + 80 + 2

Step-by-step explanation: Expanded form is writing out the number like I did tbh..hard to explain you just gonna practice but here ya go :)) !

Answer:

100,000+80,000+6,000+200+80+2

Step-by-step explanation:

You see it

If you know the place values,Then you can do expanded form.

Answer:

x = 7

Step-by-step explanation:

As in right triangle, the other two angles sum up equal to 90 degree, so 6x + 15 + 33 = 90, then solve for x, 6x = 90 - 15 - 33 = 42, then x = 7.

Answer:

105

Step-by-step explanation:

Answer:105

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

Subtract the exponents. 8-2=6 Therfore B. Sorry im in a rush.

If this was helpful, please give brainliest! It would help a lot!

Answer:

17 feet 10 inches

Step-by-step explanation:

26 feet 10 inches is cut from a wire that is 44 feet 8 inches

Therefore the length of wire that is left can be calculated as follows

44 feet 8 inches - 26 feet 10 inches

= 17 feet 10 inches

Answer:

Part a) The area of the figure is [tex]\frac{9}{2} (4+\pi ) cm^{2}[/tex]

Part b) The perimeter of the figure is [tex]3(2+2\sqrt{2} +\pi )cm[/tex]

{362- {6x3+(48/2) x2]}+3(9+4)

{362- {6x3+24 x2]}+3(9+4)

{362- 66+3(9+4)

{362- 66+3(9+4)

{296+3(13)}

(296+39)

335

hope this help you

have a good day

Answer:

Step-by-step explanation:

Solving with one operation at each step:

Answer:

D

Step-by-step explanation:

Answer:

y=2x-3

Step-by-step explanation:

First we find the y-intercept of this graph whic in this case is -3. Then we plot two pints on the graph and caculate the rise over run which is 2/1=2. Finally, we get the equation- y=2x-3.

Answer:

32-Alecia and 8-sister

Step-by-step explanation:

4x+x=40

5x=40

x=8

Answer:

1. The critical value to be used for constructing the confidence interval is 1.415

2. The standard error of the sampling distribution to be used in constructing the confidence interval, is approximately 6.260

Step-by-step explanation:

The number of mail-order receipts, n₁ = 8 sales receipts

The mean amount of sale, [tex]\bar x_1[/tex] = $69.30

The standard deviation of the sample, σ₁ = $26.25

The number of internet sales receipts, n₂ = 17 sales receipts

The mean amount of sale, [tex]\bar x_2[/tex] = $75.90

The standard deviation of the sample, σ₂ = $28.25

1. Where the population variance are not equal, we have;

[tex]\left (\bar{x}_1-\bar{x}_{2} \right ) - t_{c}\sqrt{\dfrac{\sigma _{1}^{2}}{n_{1}}-\dfrac{\sigma _{2}^{2}}{n_{2}}}< \mu _{1}-\mu _{2}< \left (\bar{x}_1-\bar{x}_{2} \right ) + t_{c}\sqrt{\dfrac{\sigma _{1}^{2}}{n_{1}}-\dfrac{\sigma _{2}^{2}}{n_{2}}}[/tex]

Where;

[tex]t_c[/tex] = The critical value for constructing the confidence interval

[tex]\sqrt{\dfrac{\sigma _{1}^{2}}{n_{1}}-\dfrac{\sigma _{2}^{2}}{n_{2}}}[/tex] = [tex]S.E_{\bar{x}_1-\bar{x}_{2}} =[/tex] The standard error for constructing the confidence interval

The degrees of freedom, df = n₁ - 1 = 8 - 1 = 7

The t-value at 90% confidence level, and degrees of freedom of 7, [tex]t_{90\%, 7}[/tex], from the tables is given as follows;

[tex]t_c[/tex] = [tex]t_{90\%, \, 7}[/tex] = 1.415

The critical value for constructing the confidence interval = [tex]t_c[/tex] = 1.415

2. The standard error of the sampling distribution to be used in constructing the confidence interval, [tex]S.E._{\bar{x}_1-\bar{x}_{2}}[/tex], is given as follows

[tex]S.E_{\bar{x}_1-\bar{x}_{2}} = \sqrt{\dfrac{\sigma _{1}^{2}}{n_{1}}-\dfrac{\sigma _{2}^{2}}{n_{2}}}[/tex]

[tex]S.E._{\bar{x}_1-\bar{x}_{2}} = \sqrt{\dfrac{26.25^{2}}{8}-\dfrac{28.25^{2}}{17}} \approx 6.260[/tex]

[tex]S.E._{\bar{x}_1-\bar{x}_{2}}[/tex] ≈ 6.260

The standard error of the sampling distribution to be used in constructing the confidence interval, [tex]S.E._{\bar{x}_1-\bar{x}_{2}}[/tex] ≈ 6.260

Answer: I think it B (130)

Step-by-step explanation: .........