A psychology professor wants to know whether verbal ability is related to memory quality in current first-year students at her small college. Participants in the study (first-year students at her college) complete an online memory task. The students are first shown a list of 60 words. Next they are shown a list of 10 words that were on the original list. Then they are asked to identify the words on the second list that appeared on the original list. She uses the percentage of words that were correctly recognized on the original list as her measure of memory quality. She also asks the students to report several characteristics such as their age, gender, and verbal SAT score. Each of the 750 first-year students (338 males and 412 females) at her school volunteers to participate. The professor chose 75 students at random to complete the memory task and answer the questions. The average percentage of words that were correctly recognized on the original list was 68%. The professor infers that if all 750 first-year students had completed the study, the results would show that an average of 68% (plus or minus sampling error) of the words were correctly recognized as being on the original list. Which of the following are variables in the study? Check all that apply.
A. The students' verbal SAT scores
B. The students' percentage of words that were correctly recognized on the original list
C. The 75 students
D. The 750 students

Answer:

x=5

Step-by-step explanation:

k(x)=6x–12

18=6x–12

18+12=6x

30=6x

30/6=6x/6

x=5

i think it is clear answer.

Answer:

tan(13)-tan(2)

Step-by-step explanation:

= Monthsarry namin ng bebe ko

Answer:

50

Step-by-step explanation:

i asked alexa so yeaaa

Answer:

i dont no hindi ko alam eh

Step-by-step explanation:

-Given

-4

-Divison Property Of Equality

-3

Answer:

2 3/5

Step-by-step explanation:

Answer:

x=2

y= -4/3

y=2/3

x=-4

Step-by-step explanation:

4x-6(0)=8

4x-0=8

4x=8

x=2

4(0)-6y=8

0-6y=8

-6y=8

y=-4/3

4(3)-6y=8

12-6y=8

-6y=-4

y=2/3

4x-6(-4)=8

4x+24=8

4x=-16

x=-4

Answer:

  y = -5/4x -19

Step-by-step explanation:

It is often convenient to simplify a point-slope form of the equation.

  y = m(x -h) +k . . . . . line with slope m through (h, k)

  y = -5/4(x -(-8)) -9 . . . . fill in given values

  y = -5/4x -10 -9

  y = -5/4x -19

Answer:

b, controlled variables are constant and unchanged

A controlled variable is what is held constant. When doing an experiment, it is ideal to only focus on one variable at a time while keeping everything else in check. This way you can compare two items effectively.

In contrast, a manipulated variable is one that is intentionally changed to see how it affects the subject. For example, if you're testing various fertilizers, then the fertilizer brand would be the manipulated variable. The soil, moisture, amount of sunlight, and other environmental factors are kept the same (each subject gets the same about of each) making them to be controlled variables.

Answer:

x=6

Step-by-step explanation:

The picture is a little unclear but I hope this is true...

To find the perimeter you need to add the sides of the triangles and the question says that the perimeters of the triangles are equal. So,...

(2x+4)+(2x)+(2x+3)=(3x+1)+(2x)+(2x)

2x+4+2x+2x+3=3x+1+2x+2x

4+2x+3=3x+1

7+2x=3x+1

2x-3x=1-7

-x=-6

x=6

Answer:

b

Step-by-step explanation:

Answer:

B. 22 feet.

Step-by-step explanation:

The width is adding 2 feet for every time the length is adding 8 feet. So, 88+8=96, and 20+2=22.

Problem 1

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

Explanation:

Add the equations straight down.

The x terms add to 5x+(-3x) = 2x

The y terms cancel out since 3y+(-3y) = 0y = 0

The right hand sides add to -7+3 = -3

After adding the equations you should get 2x = -4 which solves to x = -2

=====================================================

Problem 2

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

Explanation:

Since 5x = 0, this means x = 0 after dividing both sides by 5.

Use this to find y

y = -4x+4

y = -4(0)+4

y = 4

If you want the value of z, then

x = -3y+z+6

0 = -3(4)+z+6

0 = z-6

6 = z

z = 6

Answer:

Step-by-step explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 14.3 g

volume = 3.2 cm³

We have

[tex]density = \frac{14.3}{3.2} \\ = 4.46875[/tex]

We have the final answer as

Hope this helps you

Answer:

The answer is 4.47 g/cm³

Step-by-step explanation:

Answer:

[tex]Solution: f(x)\ge-5\\Interval:[-5,\infty)[/tex]

Step-by-step explanation:

Equation: [tex]\frac{1}{4} x^2-5 = y[/tex]

1). [tex]\frac{1}{4} x^2-5 = y[/tex] →[tex]\frac{x^2}{4}-5=y[/tex]

2). [tex]\frac{x^2}{4}-5=y[/tex] ∴ [tex]a=\frac{1}{4}, b=0, c=-5[/tex]

3). [tex]x_v=-\frac{b}{2a}[/tex]

         [tex]=-\frac{0}{2(\frac{1}{4})}[/tex]

         [tex]=0[/tex]

4). now plug [tex]x_v[/tex] into [tex]y_v[/tex]

[tex]y_v=\frac{0^2}{4}-5[/tex]

    [tex]=-5[/tex]

5). Minimum (0,-5) ∴ [tex]f(x)\ge-5[/tex]

Answer:

Geometry so easy

Step-by-step explanation:

You can do it..

Answer:

100.40

Step-by-step explanation:

if 6 members has paid, then the remaining 8 will be 8 x 12.55 = 100.4

Answer:

The answer is $100.40

Step-by-step explanation:

ok. their are 14 members. 6 members payed their dues in week 1. so, subtract 6 from 14.    14 - 6 = 8.    Now, the due is $12.55. 8 members payed their dues in week 2, so multiply 8 by 12.55.     8 x 12.55 = 100.50    the answer SHOULD be $100.50 i would think, but there is not an option for that. so, i would pick option 4, because that is .10 off from 100.50. Good luck!!

Answer:

Step-by-step explanation:

Explaining the Basic Concept:

This is a piecewise function, which means that it is made up of several different functions which all have different domains

In this question, we have 3 'pieces' in our piecewise function

the domain of each piece is:

1.   x < -1

2.  -1 ≤ x ≤ 2

3.  x > 2

we will use the function related with the respective domain

Finding the values of the function:

h(-4)

Here, our input value is -4

we notice that -4 is in part of the first domain

therefore, -4 is in the domain of the first function

So, we will use the first function

h(x) = -(x/4) + 2           (for x < -1)

replacing x with -4

h(-4) = -(-4/4) + 2

h(-4) = 1 + 2

h(-4) = 3

h(1):

Here, our input value is 1

we notice that 1 is a part of the second domain

Hence, 1 is in the domain of the second function

So, we will use the second function

h(x) = -(x-1)² + 2            (for -1 ≤ x ≤ 2)

replacing x with 1

h(1) = -(1-1)² + 2

h(1) = -(0)² + 2

h(1) = 2

h(2):

Here, out input value is 2

We notice that 2 is a part of the second domain

Hence, 2 is a part of the domain of the second function

So, we will use the second function

h(x) = -(x-1)² + 2            (for -1 ≤ x ≤ 2)

replacing x with 2

h(2) = -(2-1)² + 2

h(2) = -(1)² + 2

h(2) = - 1 + 2

h(2) = 1

Therefore:

h(-4) = 3

h(1) = 2

h(2) = 1

Answer:

y=3 the answer is 9 to the equation

1:  0.7142857143

2:  0.04761904762

3:  0.2142857143

4:  0.8666666667

5:  0.2727272727

6: 0.3888888889

7:  0.3333333333

8:  0.4444444444

9:  0.3333333333

10:  0.3571428571

11:    0.36

12:  0.8

13:  0.2307692308

14:  0.875

15:  0.8

16:  0.04761904762

Answer:

each bus has cost $2 thats it

Answer:

The mass of the substance is  [tex]\mathit{8\cdot 10^{3}}[/tex] grams.

Step-by-step explanation:

Scientific Notation

The mass of a substance is [tex]8\cdot 10^9[/tex] micrograms and one microgram is 0.000001 grams.

This last unit needs to be expressed in scientific notation:

[tex]0.000001 grams = 1\cdot 10^{-6}[/tex]

The mass of the substance in grams is calculated by:

[tex]8\cdot 10^9 * 1\cdot 10^{-6}[/tex]

Multiply the magnitudes and add the exponents:

[tex]8\cdot 10^9 * 1\cdot 10^{-6}=8\cdot 10^{-6+9}=8\cdot 10^{3}[/tex]

The mass of the substance is [tex]\mathbf{8\cdot 10^{3}}[/tex] grams.

Answer:

it is 82.53 round to 82.50 ithink

Answer:

130 balloons

Step-by-step explanation:

Answer:

In math, prime numbers are whole numbers greater than 1, which have only two factors – 1 and the number itself. Prime numbers are divisible only by the number 1 or itself. For example, 2, 3, 5, 7, and 11 are the first few prime numbers.

Step-by-step explanation:

hope this helps :)

Answer:

The point-slope form of the line is y - 3 = -2(x + 2)

Step-by-step explanation:

The point-slope form of the equation of a line is

y - y1 = m(x - x1), where

The rule of the slope is [tex]m=\frac{y2-y1}{x2-x1}[/tex] , where

Let us use these rules to solve the question

∵ (-2, 3) and (0, -1) are two points on the line

∴ x1 = -2 and y1 = 3

∴ x2 = 0 and y2 = -1

→ Substitute them in the rule of the slope to find it

∵ m = [tex]\frac{-1-3}{0--2}=\frac{-4}{0+2}=\frac{-4}{2}=-2[/tex]

∴ m = -2

→ Substitute the value of m and point (-2, 3) in the form of the

   equation above

∵ m = -2 and (x1, y1) = (-2, 3)

∴ y - 3 = -2(x - -2)

→ Remember (-)(-) = (+)

∴ y - 3 = -2(x + 2)

∴ The point-slope form of the line is y - 3 = -2(x + 2)

Answer:

The answer is [tex](x-9) (x-3)[/tex].

Step-by-step explanation:

This is because when you multiply them together you get

[tex]x^{2}[/tex], [tex]-9x[/tex], [tex]-3x[/tex], and [tex]27[/tex]

When you add the like terms you get,

[tex]x^{2} - 12x +27[/tex]

Answer:

9

Step-by-step explanation:

3x3=9

its nine bruhhhhhhhhhhhhh

Answer:

Dimensions of Rectangle B will be 9x inches by 3x inches where x is a scaling factor.

Step-by-step explanation:

Scaled Copy: It means that the rectangle A is related to rectangle B by some scaling (multiplying) factor x.

As we are given Dimensions of rectangle A =  9 inches by 3 inches

Then for any scaling factor x the dimensions of rectangle B will be:

Dimensions of Rectangle B = x * ( Dimensions of rectangle A)

Dimension of rectangle B = x * (9 inches by 3 inches)

Dimensions of rectangle B = 9x inches by 3x inches

For more understanding let we assume that rectangle B is scaled copy of rectangle A by scaling factor x=3; then we will have the dimensions of rectangle B as under:

For scaling factor (x) = 3;

Dimensions of Rectangle B = x * ( Dimensions of rectangle A)

Dimensions of rectangle B = 3 (9 inches by 3 inches)

Dimensions of rectangle B = 27 inches by 9 inches

On the other hand for scaling factor x=0.75, the dimensions of rectangle B will become as under;

Dimensions of Rectangle B = x * ( Dimensions of rectangle A)

Dimensions of rectangle B = 0.75 (9 inches by 3 inches)

Dimensions of rectangle B = 6.75 inches by 2.25 inches

Answer:

[tex]\frac{5}{2}[/tex] improper fraction or [tex]2\frac{1}{2}[/tex] mixed number

Step-by-step explanation:

To find the answer you would need to do [tex]\frac{5}{8}[/tex] divided by [tex]\frac{1}{4}[/tex]

Hope this helps!

The division of the fraction numbers 5/8 and 1/4 in the decimal form will be 2.5.

Algebra is the study of algebraic expressions, while logic is the manipulation of those concepts.

The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This rule is used to answer the problem correctly and precisely.

The numbers are given below.

5/8 and 1/4

Then the division of the numbers 5/8 and 1/4 will be given by putting a division sign between them. Then we have

⇒ (5/8) ÷ (1/4)

⇒ (5/8) x (4)

⇒ 5/2

⇒ 2.5

The division of the fraction numbers 5/8 and 1/4 in the decimal form will be 2.5.

More about the Algebra link is given below.

https://brainly.com/question/953809

#SPJ2

Answer:

The company lost 3 dollars

9-6= (-3)

Step-by-step explanation:

Answer:

(0, -5)

Step-by-step explanation:

For Y-intercept: put X = 0

5x-3y=15

-3y=15-5x

3y=-15+5x

y=-5+5/3x

y=5/3x-5