An educator is interested in the relationship between how many hours students spend doing homework and the scores earned on exams. He gathers data from 12 students and calculates the least-squares regression line to be ŷ = 68.4 + 1.46x, where ŷ is the score on an exam and x is the number of hours spent doing homework. The residual plot is shown.


Based on the residual plot, is the linear model appropriate?

No, the residuals are relatively large.
No, there is a clear pattern in the residual plot.
Yes, there is no clear pattern in the residual plot.
Yes, about half of the residuals are positive and half are negative

Step-by-step explanation:

This is the answer , I hope you understand

Answer:

12:35

Step-by-step explanation:

the first bus is at 10:35 so 10:35 + 2:00 = 12:35

Answer:

12:35 p.m.

Step-by-step explanation:

I mean it's pretty simple tbh. If the bus departs every two hours, then two hours from 10:35 is 12:35 p.m.

Answer:

question 2

a) rectangle

b) all of the angles are 90 degrees

c) 3+3+4+4=14 units

d) 12 units squared

question 3

if their slopes are the same, they are parallel.

if the lines do not intersect graphically, they are parallel.

if the slopes multiply to -1, they are perpendicular.

if the degree made by the intersection is 90 degrees, the lines are perpendicular.

Answer:

0.152 acres

Step-by-step explanation:

Given the information that 79 pounds of seed means you can plant 12 acres of field, we can set the two equal to each other:

      79 pounds of seed = 12 acres

Now, we just need to use 1 pound of seed to solve for the amount of acres that can be planted per that one pound:

      1 pound seed ([tex]12acres/79pounds[/tex]) = 0.152 acres

Answer:

1. x + 34

2. 2x - 12

3. x - 16

4. x + 45

5. 23 - x

6. 6(x - 7)

7. 78 - 4x

8. 4x + 10

9. 3x + 2

10. x(13 - x)

Step-by-step explanation:

For problems like this in the future, pay attention to the order of words, and how they go together! For example- "the difference of 23 and a number" means to subtract a number from 23, whereas "the difference of a number and 23" would mean to subtract 23 from the number. Words like "increase" and "sum" both mean addition; "product" and "times" both mean multiplication; "difference" and "less" mean subtraction. Just keep these in mind (and watch for context)!

I hope this helped! :)

The inerest that Gary will receive semiannually on the bond he bought is $390.

Interest is the regular payment a bondholder would receive during the live of the bond. When the interest is received semiannually, it means the bondholder is paid twice a month.

Interest = face value x (coupon rate / 2)

(6.5 / 2) x $12000= $390

To learn more about interest, please check: https://brainly.com/question/26164549

Answer:

$390

Step-by-step explanation:

12,000 x 6.5% = 780

780/2=390

took the test

Answer: A=0.8767601914

First you need to find the value of cos(3) and sin(7) which happens to be cos(3)=0.9986295348A and sin(7)=0.1218693434A. So you have the numbers, then what do you do with them? Well you will want to subtract them both and find the difference between them which should be the value of A. so 0.9986295348-0.1218693434=0.8767601914 so A=0.8767601914 if you want you can simplify this...

Step-by-step explanation:

BOOM mistah-CLEAN BABY.

Answer:

120° = 2(x)°

120/2 = x

60 = x

Step-by-step explanation:

120° = 2(x)° because the two lines cross forming an x shape and angles opposite to each other are always equal in lines forming x shapes. Hence you can form an equation as shown above and solve it for x. Since the above equation is a linear one you can simply solve it by bringing all the numbers to one side. since 2 is multiplied on the right hand side, when we bring it to the left it has to be divided.

Answer:30

Step-by-step explanation:

Answer:

B)

Step-by-step explanation:

Why A Doesn't Work:

y=mx+b is a linear equation.

y=2x, y=2x+0 which is a linear equation.

Why C doesn't work:

Anything with x² in it is a parabola. Anything.

4x² is a parabola, not an exponential equation.

Check for yourself on Desmos.

Why D doesn't work:

2(0.5)x

2(0.5) = 1

(1)x = 1x

y=1x,  y = 1x+0 = LINEAR

Why B Works:

I do not understand what B is supposed to be, but I suppose it is correct by using the process of elimination.

Hope this helps :)

-jp524

Answer:

Step-by-step explanation:

[tex]Area \ of \ the \ triangle = \dfrac{1}{2}bh[/tex]

b is the base of the triangle.

h  is the perpendicular height

Answer:   140 days

Step-by-step explanation:

3 times 35 is 105 days

35 plus 105 is 140 days

Answer:

c = 3

Step-by-step explanation:

y = 4x + c

to find c substitute (1, 7 ) into the equation

7 = 4 + c ⇒ c = 7 - 4 = 3

Answer:

38 quarters

Step-by-step explanation:

0.25 x 63 = 15.75

0.05 x 63 = 3.15

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

0.25 x 50 = 12.50

                    +         = $13.15

0.05 x 13 = 0.65

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

0.25 x 25 = 6.25

                   +        = $8.15

0.05 x 38 = 1.90

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

0.25 x 30 = 7.50

                   +         = $9.15

0.05 x 33 = 1.65

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

0.25 x 35 = 8.75

                   +        = $10.15

0.05 x 28 = 1.40

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

0.25 x 38 = 9.50

                   +        = $10.75

0.05 x 25 = 1.25

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

I hope this helps!

Answer:

my diagram calculation could help

I hope it helps

answer : w²+ wx + xw + x²

Answer:only if all of the terms in the two expressions are the same, then the two expressions are similar

let the vertices on either side of the 0 be A and B

then let the vertex opposite of O be C

First, angle ACB will be equal to 90° as it is the angle that lies on the same arc as the diameter. From there you can find angle y with angle A+ angle B+ Angle C=180°

then you can find the angle complementary to x with the same formula then you can subtract that angle with 90° to get x.

Answer:

90°

Step-by-step explanation:

let the vertices on either side of the 0 be A and B

then let the vertex opposite of O be C

First, angle ACB will be equal to 90° as it is the angle that lies on the same arc as the diameter. From there you can find angle y with angle A+ angle B+ Angle C=180°

then you can find the angle complementary to x with the same formula then you can subtract that angle with 90° to get x.

Answer:

18

Step-by-step explanation:

Answer:

1/2 split into 4 parts

Step-by-step explanation:

i cant draw it

Answer:

subtotal 9.76

Step-by-step explanation:

i can tell the last 2

hope this helps

pls mark brainliest

Answer:

2

Step-by-step explanation:

3x=6

same thing as 3*x=6

3*2=6

x=2

Answer:

dz/dt = -(3x + 9y)/z

Step-by-step explanation:

x² + y² + z² = 9

2x dx/dt + 2y dy/dt + 2z dz/dt = 0

x dx/dt + y dy/dt + z dz/dt = 0

x * 3 + y * 9 + z dz/dt = 0

so

dz/dt = -(3x + 9y)/z

Answer:

f(4) = -129

Step-by-step explanation:

Substitute the value of x which is 4

f(x) = -2x4 + 6x3 - 3x + 11

f(4) = -2(4)4 + 6(4)3 - 3(4) + 11

f(4) = -2(256) + 6(64) - 12 + 11

f(4) = -512 + 384 - 1

f(4) = -128 - 1

f(4) = -129

Answer:

D. 10π

Step-by-step explanation:

To find the circumference of a circle, use the equation:

circumference = 2πr

We can substitute the radius into this equation: c = 2 × π × 5. This is equal to 10π.

Hope this helps!

Answer:

$7,500

Step-by-step explanation:

65% = 4875

divide both by 65

1% = 75

multiply by 100

100% = 7500

Answer:

6

Step-by-step explanation:

1 is in the ones place, 8 is in the tens place, 8 is in the hundreds place, 0 is in the thousands place, which means 6 is now in the ten thousands place.

Answer:

6 is in the ten thousands place

Answer:

12

Step-by-step explanation:

Answer:

Are there any measurements for the size of the prisms? I think we need more info for this. I'll delete this when you answer and upload a new one :)

Step-by-step explanation:

The amount of sand left after building the sand castle is 290 inches³.

Rectangular prism is a three dimensional shape which consist of six faces. The two faces are at the top and bottom and the other faces are lateral faces.

We have to find the volume of each of the rectangular prism to know how much sand is used to make the castle.

Volume of a rectangular prism = l × w × h

where l, h and w are length, height and width of the prism respectively.

Volume of larger prism = 15 × 15 × 6

                                       = 1350 inches³

Volume of smaller prism = 9 × 8 × 5

                                         = 360 inches³

Total volume of the castle = 1350 + 360 = 1710 inches³

Remaining sand = 2000 - 1710 = 290 inches³

Hence the sand that remains is 290 inches³.

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