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harkovskaia [24]
3 years ago
9

Please select the best answer from the choices provided Thank you (:

Mathematics
2 answers:
Karo-lina-s [1.5K]3 years ago
7 0
I would agree with the answer of c, hope this helps
jonny [76]3 years ago
4 0

Answer:

The quadratic regression equation for the given data set is:

Option: C

C.\ -0.875x^2-3.5964x+20.179.

Step-by-step explanation:

We are given the data set of values of the input value i.e. x and output value i.e. y in table form by:

 Input (x)            Output(y)

    0                       20

     1                        16

     2                       10

     3                        0

     4                       -7

     5                      -20

Now when we represent these data points on the scatter plot; we see that the quadratic equation that is obtained by plotting these points is:

-0.875x^2-3.5964x+20.179.

You might be interested in
Layla requires 2.25 pounds of cream cheese for a cake. She has 4 ounces of cream cheese. Cream cheese is available in the store
nikklg [1K]

Answer:

4 blocks of cream cheese

Step-by-step explanation:

there are 16 Ounces in a pound.

You have 4 ounces of cream cheese.  4 is 25% of 16 so we subtract .25 from the required amount which is 2.25.

NOW we need 2 pounds. well, each block is 8 ounces, and we need in total 32 ounces. 32/8=4 blocks

6 0
3 years ago
Consider the solution to the system of inequalities below.
Kay [80]

Answer:  y<2

Step-by-step explanation:

Since we can say a functions could be added to the system without changing the solution set if after including it to the system the feasible region of entire system is not affected.

Here, the solution to the system of inequalities is,

y≤ 0.5x+2

y>3x-3

Since after ploting these two enequslties in the graph we get our feasible region.

When we include y > 2 in the system there is no solution of the system.

Therefore it affects the system.

Now when we include y < 2 in the system the solution or feasible region remain same.

Therefore it does not affect the system.

When we include y > 3 in the system there is no solution of the system.

Therefore it affects the system.

When we include line y=3 in the system then the system has no solution.

Therefore, it affects the system.

Thus, second Option  is correct.


4 0
3 years ago
A statistics professor gives a survey to each of the 20 students in an introductory statistics course. The survey asks the stude
tekilochka [14]

Answer:

B2 = 0.465 --- Population standard deviation

C2 = 0.216 --- Population Variance

Step-by-step explanation:

Given: Wake-up time data

Required: Determine the population standard deviation and the population variance using Excel

First, enter the given data in Excel

For this question, I entered the data in cell A2 through cell A21

Cell B2 and Cell C2 were used to hold the results of the population standard deviation and the population variance, respectively.

In cell B2, the formula to use is:

=ROUNDUP(STDEV.P(A2:A21),3)

The round function rounds the result to 3 decimal places while STDEV.P calculates the population standard deviation.

So, the result is:

B2 = 0.465

In cell C2, the formula to use is:

=ROUND(VAR.P(A2:A21),3)

The round function rounds the result to 3 decimal places while VAR.P calculates the population variance.

So, the result is:

C2 = 0.216

<em>See attachment for Excel file</em>

Download xlsx
3 0
3 years ago
I need help fast plss
Marysya12 [62]

Answer:

a = 1√6

b = -2

Step-by-step explanation:

Hello,

To solve this trigonometric problem, we need to convert this values into fractions

a).

Sin45° = 1/√2

cos30° = √3/2

Sin60° = √3/2

Sin45° / (cos30° + sin60°) = [(1/√2) ÷ (√3/2 + √3/2)]

(1/√2) ÷ (√3/2 + √3/2)

Add √3/2 + √3/2

1/√2 ÷ 2√3/2

1/√2 × 2/2√3

2/2√(2×3)

2/2√6

1/√6

b

Cos 180° = -1

Sin150° = ½

Tan135° = -1

2cos180° - 2sin150° - tan135°

(2 × -1) - (2×½) - (-1)

-2 - 1 + 1 = -2

3 0
3 years ago
What is an amount between $2 and $10?
marissa [1.9K]

Answer:

6

Step-by-step explanation:

3 0
3 years ago
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