I really need help?!

I Really Need Help?!

Answers

Answer 1

Answer:

the answer is a

Step-by-step explanation:


Related Questions

Education reform is one of the most hotly debated subjects on both state and national policymakers’ list of socioeconomic topics. Consider a linear regression model that relates school expenditures and family background to student performance in Massachusetts using 224 school districts. The response variable is the mean score on the MCAS (Massachusetts Comprehensive Assessment System) exam given to 10th graders. Four predictor variables are used: (1) STR is the student-to-teacher ratio in %, (2) TSAL is the average teacher’s salary in $1,000s, (3) INC is the median household income in $1,000s, and (4) SGL is the percentage of single-parent households. A portion of the data is shown in the accompanying table.

Score STR(%) TSAL(in $1000) INC(in $1000) SGL(%)
227.0 19.00 44.01 48.89 4.70
230.67 17.90 40.17 43.91 4.60
. . . . .
. . . . .
230.67 19.20 44.79 47.64 5.10

Required:
a. For each explanatory variable, discuss whether it is likely to have a positive or negative causal effect on Score.
b. Find the sample regression equation. Are the signs of the slope coefficients as expected?
c. What is the predicted score if STR = 18, TSAL = 50, INC = 60, SGL = 5?
d. What is the predicted score if everything else is the same as in part(c) except INC = 80?

Answers

Answer:

A:

STR= -

TSAL= +

INC=+

SGL=-

B:

231.89 - .50 - .02 + .29 -.88

B2:

STR=Y

TSAL=N

INC=Y

SGL=Y

C:

234.89

D:

240.69

Step-by-step explanation:

A boat heads in the direction N 78° E. The speed of the boat relative to the water is 21 mi/h. The water is flowing directly south. It
is observed that the true direction of the boat is directly east. (Assume that the i vector points east, and the j vector points north.)
(a) Express the velocity of the boat relative to the water as a vector in component form. (Round your answer to one decimal
place.)
(20.5, 4.4)

Answers

Answer:

it is the vector

Step-by-step explanation:

The function f (t) = 12(1 +0.03) can be used to determine the population, in thousands of a town t years
since 1955. According to the function, what was the population of the town in 1955 and what was the percent
increase in population from year to year?
Enter a number in each box to correctly complete the sentence
The population of the town in 1955 was
people, and the percent increase in
population from year to year was

Answers

f= the original amount of people, a steady growth throughout the years

t=time

In 1955 the population was 12 thousand. Compared to the current population of 12.36 thousand, the population then was roughly 77%.

A function assigns the values.  The population of the town in 1955 was 12 thousand people, and the percent increase in population from year to year was 3%.

What is a Function?

A function assigns the value of each element of one set to the other specific element of another set.

The function that gives the population of the town is given, therefore, the following can be written,

Since the year 1955 the value of t=0. Therefore, The population of the town in 1955 was 12 thousand.

The percentage increase in population from year to year is 3%.

Hence, The population of the town in 1955 was 12 thousand people, and the percent increase in population from year to year was 3%.

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Triangle ABC is equilateral. What is the value of X?

Answers

I think it’s 90
Answer step-by-step

If triangle ABC is equilateral then the value of x is 3.

What is Trigonometry?

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

ABC is an equilateral triangle.

AD is the perpendicular bisector of CB

As AC=8 units.

The other sides of triangle will be also 8 units.

D will be the midpoint of CB.

CD=4 units and DB is 4 units.

Let us consider triangle ACD

AC²=CD²+AD²

8²=4²+x²

64=16+x²

Substitute 16 from both sides.

64-16=x²

48=x²

Take square root on both sides.

x=√48

=√16×3

=4√3

Hence, if triangle ABC is equilateral then the value of x is 3.

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Find m∠D

m∠D=

greatly appreciate if done asap:)

Answers

Should be 25 since triangle are 180 degrees

Help me !!!
Please I really need it

Answers

Answer:

i don't know

Step-by-step explanation:

I need help solve this !! Pls help pls not links ;)

Answers

Answer:

A /  D /  E

Step-by-step explanation:

f (1) = 1

f(2) = 5

f(3) = 9

A mother duck lines her 9 ducklings up behind her. In how many ways can the ducklings line up?

Answers

Factorial of 9
9! = 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1

Imagine the spots of the ducklings, the beginning there are one possibility of 9 ducklings. Afterwards the possibility goes to 8 and so on...

Solution: 362,880 possibilities

There are 362,880 ways to ducklings line up.

What is Multiplication?

To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.

Given that;

A mother duck lines her 9 ducklings up behind her.

Now,

Since, A mother duck lines her 9 ducklings up behind her.

Hence, By using Fundamental counting principal we get;

The number of ways for ducklings line up = 9!

                                                                 = 9×8×7×6×5×4×3×2×1

                                                                 = 362,880

Thus, The number of ways for ducklings line up = 362,880

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Please help I AM BEGGING YOU

Answers

Answer:

600 sq.ft.

Step-by-step explanation:

10 * 24 = 240 / 2 = 120

20*24 = 480

480+120 = 600

600 sq.ft.

Answer:

720

Step-by-step explanation:

So there are two things you need to remember to sovle this problem.

First, the formula for area of a square. This is just base x height.

Second, the formula for area of a triangle. THis is just 1/2 x base x height.

Lets plug our values into both formulas and see what we get.

So the area of the square would be:

24 x 20.

This is 480.

Now that we know the area of the square is 480, lets find the area of the traingle:

1/2 x 24 x 20

This will get you 240.

Low lets just add the two together, and we get:

240+480=720

So the area is:

720

Please help please please ASAP please please help please

Answers

Answer:

true

Step-by-step explanation:

the total surface area of a solid is the sum of all faces both the bottom (base) and the top

The origin is a point anywhere along the x-axis. True or False

Answers

Answer:

False

Step-by-step explanation:

The origin is at 0 on the x-axis, and 0 on the y-axis. Hence, (0,0) lies on both the axis.

hope this helps and is right. p.s. i really need brainliest :)

if my answer is wrong then i am incredibly sorry!

The statement "The origin is a point anywhere along the x-axis" is False.

What is Origin?

Origin is referred to as the first point or the starting point from which we begin our calculations or measurements in mathematics, particularly in the subject of coordinate geometry. The 0 on a ruler is the point at which we begin taking measurements; as a result, it is referred regarded as the scale's origin.

As, The intersection of the x and y axes in a coordinate plane is where the origin is located.

Coordinates can be used to name any point on the coordinate plane.

The coordinates are where the origin is ( 0, 0 ).

So, the x- coordinate is 0 and y- coordinates is 0.

Hence, the given statement is False.

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Plss help this is timed!!

Answers

Answer:

8/35

Step-by-step explanation:

Answer:

8 7/20

Step-by-step explanation:

I'm not quite sure but I hope it will help you if I'm wrong tell me I'll try it again good day don't forget to tell me if I'm wrong.

5/10+13/100
what is the value of the expression

Answers

Answer:

63/100

Step-by-step explanation:

Fill in the table using this function rule y=-10x+2

Answers

Step-by-step explanation:

If X=-1, then we have to multiply by -10 and then add 2. It would be 8.

If X=0, we multiply it by -10, (still 0) and then add 2 so it would be 2.

If X=1, 1*-10=-10 and then -10+2=-8

If X=5, 5*-10=-50, -50+2=-48.

Hope this helps!

Fine the volume please

Answers

Answer:

212 m²

Step-by-step explanation:

4 x 4 x 5 = 80

6+6+50+30+40

A bag contains 3 red balls and 1 blue ball. A second bag contains 1 red ball and 1 blue ball. A ball is randomly picked from each bag and is then placed in the other bag. What is the expected number of red balls in the first bag? (mean or expected value)

Answers

Answer:

"2.82" seems to be the correct solution.

Step-by-step explanation:

As we know,

A bag (Bag A) contains,

Red balls = 3

Blue ball = 1

A second bag (Bag B) contains,

Red balls = 1

Blue ball = 1

Now,

⇒ P(Bag A, red ball) = [tex]P(A)\times P(r)\times P(r)[/tex]

On substituting the values, we get

⇒                                = [tex]\frac{1}{2}\times \frac{3}{4}\times \frac{2}{3}[/tex]

⇒                                = [tex]\frac{1}{4}[/tex]

Similarly,

Probability of second bag will be:

⇒  P(Bag B) = [tex]\frac{1}{2}[/tex]

hence,

In the first bag (Bag A), the expected number of red balls will be:

⇒  [tex]E(n)=\Sigma P(n)\times n[/tex]

On substituting the values, we get

⇒           [tex]=3 (\frac{1}{4})+2(\frac{1}{8} )+4(\frac{1}{24} )+3(\frac{1}{12} )+3(\frac{4}{20} )+4(\frac{1}{20} )+2(\frac{3}{20} )+\frac{2}{20}[/tex]

⇒           [tex]= \frac{169}{60}[/tex]

⇒           [tex]=2.82[/tex]

PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!

Reactants or Products

Answers

Answer:

1) Reactants

2) Products

Step-by-step explanation:

Answer:

1 reactants    2 products

Step-by-step explanation:

Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

A chemical reaction is the process in which atoms present in the starting substances rearrange to give new chemical combinations present in the substances formed by the reaction. These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.

have a good day

5. Simplify
(7x2+ 8) - (x2 - 2)

Answers

Answer:

[tex](7 \times 2 + 8) - ( {x}^{2} - 2) \\ (14 + 8) - ( {x}^{2} - 2) \\ 14 + 8 - {x}^{2} + 2 \\ 22 + {x}^{2} + 2 \\ 24 + {x}^{2} [/tex]

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

The cost of a sweatshirt at a sporting-goods store is in n dollars. Sales tax is 8%. Which expressions represent the cost of a sweatshirt including sales tax? HELP ME PLEASE

Answers

Answer:

n + 0.08n

Step-by-step explanation:

The expression that should represent the cost of the sweatshirt involving sales tax is given below

Since it is given that the cost of the sweatshirt be n dollars

And, the sale tax is 8%

So, the expression should be

= n + n × 0.08

= n + 0.08n

Hence, the expression is n + 0.08n

The same would be considered and relevant too

JUST THE SECOND ONE EASY PLS ASAP

Answers

Answer:

51

Step-by-step explanation:

Use an online calculator

Which graphs are proportional?

A.
B.
C.
D.

Answers

Answer: Hello, There! your Answer is Below

C And D Are your Answer

Step-by-step explanation:

Hope this Helps you !!!

Have a great day!!!

Whatever answer this question first gets a thanks and 14 points Please answer quickly ✌

Answers

Answer:

5) x = 25

6) x = 48

Step-by-step explanation:

5)

65 + x = 90

65 - 65 + x = 90 - 65

x = 25

--------------------------------------

6)

A complementary angle is 90 degrees.

42 + x = 90

42 - 42 + x = 90 - 42

x = 48

What’s the correct answer for this?

Answers

Answer:

Step-by-step explanation: A

Answer:

A = 2

B= 2

C= -6

Step-by-step explanation:

1.  2x³ - 8x² -24x  -Factor

2. 2x (x² - 4x - 12) - Factor

3. 2x (x - 6) (x + 2)

   ax (x + b) (x + c)  

i really can't figure this out

A slope

B x-intercept

C y-intercept

D none of the above ​

Answers

Answer:

A, slope

I am pretty sure it is the slope

Answer:

I think the answer is B (x-intercept)

Step-by-step explanation:

Have a nice day :)

Help help help help help

Answers

Answer: A person must be less than 3’6 because 42 inches=3’6 and > symbol indicates less than. Other answer is greater than.

Riley can afford to spend at most $50 on a birthday gift and wrapping. He has to spend $12 on the wrapping paper and card. What is the maximum amount Riley can spend on the birthday gift?


PART A: Write an inequality to represent the situation.


PART B: Solve AND GRAPH the inequality solution.

Answers

Answer:

Step-by-step explanation:Hello How Is Your Day

Pick the correct value for the image of A after applying the rotation matrix.

(- 3, -4)

(- 1, -4)

(1, -4)

(3, -4)

Answers

Answer:

A) (- 3, -4)

Step-by-step explanation:

edge 2021

Answer:

A) (-3, -4)

Step-by-step explanation:

Two dice are tossed. Find the probability of getting the sum of the
dice equal to 16. (Hint: Draw a tree diagram of the possibilities of
two tosses of a die, and then find the sum of the numbers on
each branch.)

Answers

Answer:

Step-by-step explanation:

If you are talking about a die with 6 faces, then 16 isn't possible. 12 is the highest possible number.

If you are talking about some other kind of die, you have to specify it.

I'm going to assume you made a mistake and meant 6.

There are 5 ways to get six

3 - 3

4 - 2

2 - 4

5 - 1

1  - 5

There are  36 ways of throwing 2 dice.

So the probability = 5/36 = 0.1389

If you really did mean 16 then the probability = 0

Assume that y varies inversely as x. If, y, is 2.4 when x = 5, which is an equation that relates x and y?

Answers

k=y•x
Inverse means 1/variable
y=k•1/x
y=k/x
k=y•x

x=5
y=2.4
k=2.4 • 5
k=12

Answer is:

y=12/x

Good luck.

In a classroom of 24 students, five-eighths of the students brought their lunch to school. How many of the students in the classroom does this represent?
(Explain how you got your answer please)

(1) 3
(2) 5
(3) 10
(4) 15
(5) 20

Answers

Answer:In my opinion 10 is the answer

hope it helps you

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