a researcher is studying the effects of playing chess on memory improvement. he identifies 50 people who play chess and 50 people who do not. each of the 100 people is given a questionnaire designed to determine memory level. none of the 100 people who participated in the study knew they were part of a study. which statement is true.

Answer:

3

Step-by-step explanation:

Answer:

You have to multiply be A before each other

Step-by-step explanation:

Answer:

A for the first one and E for the second one.

Step-by-step explanation:

These are the only ones that follow the corospondibg x and y values.

Answer:

this was 3 years ago so guessing you don't need anymore

Step-by-step explanation:

I dont have any points and i need to ask a question

Answer:

There are 280 dimes

Step-by-step explanation:

A nickel is worth 5 cents while a dime is worth 10 cents

Let n be number of nickel

d the number of dimes

n + d = 39

Secondly

$39 is same as 3900 cents

So we have;

10d + 5n = 3900

From first equation;

n = 500-d

Put this in second equation;

10d + 5(500-d) = 3900

10d + 2500-5d = 3900

5d = 3900-2500

5d = 1400

d = 1400/5

d = 280

Answer:

72 lemons

Step-by-step explanation:

Carrie uses 6 lemons to make 24 fluid ounces of lemonade. Carrie is planning a big party and needs to make 288 fluid ounces of lemonade. How many lemons will she need to use to keep the recipe proportional?

Hence:.

24 fluid ounces = 6 lemons

288 fluid ounces = x lemons

24 x = 288 × 6

x = 288 × 6/24

x = 72 lemons

Answer:

2

Step-by-step explanation:

2+5 = 7                 14 divided by 7 is 2

mark as brainliest plz

Answer:

slope = -5

Step-by-step explanation:

Trust me I made a graph

Answer:

No solutions

Step-by-step explanation:

So putting that into an equation it equals

2k+8=(4k+14)÷2

Move the 2 to the other side.

2∙2k+8=4k+14

Simplify.

4k+8=4k+14

It doesn't make sense so No Solutions

Answer:

I CANT SEE THE IMAGE BUT I NEEED POINTS xD

Step-by-step explanation:

PERIODDDDDDDDD

Answer:

Laptops, 82 is the largest number when you look at the totals.

Step-by-step explanation:

gender|    electronic tablet | Laptop | Both | Neither | Total

----------|----------------------------|------------|---------|-------------|--------

girl       |      13                       |    51      |   8     |      17      |   89

boy      |      12                       |    31      |   5     |      13      |   61

total     |      25                      |    82     |   13    |     30     |    150

LMK If I have to explain but I basically just got the 150 students from the directions and went from there.

Answer:

[tex]6.7-\left(-2.5\right)=9.2[/tex]

Step-by-step explanation:

Given the expression

[tex]6.7-\left(-2.5\right)[/tex]

Solving the expression to get the equivalent function

[tex]6.7-\left(-2.5\right)[/tex]

[tex]\mathrm{Apply\:rule}\:-\left(-a\right)=a[/tex]

[tex]=6.7+2.5[/tex]

[tex]\mathrm{Add\:the\:numbers:}\:6.7+2.5=9.2[/tex]

[tex]=9.2[/tex]

Thus,

[tex]6.7-\left(-2.5\right)=9.2[/tex]

Answer:

[tex]d = \sqrt{34}[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Algebra II

Step-by-step explanation:

Step 1: Define

Point L (-4, 3)

Point M (-7, -2)

Step 2: Find distance d

Simply plug in the 2 coordinates into the distance formula to find distance d.

Answer:

25

Step-by-step explanation: this is because you have a negative

Answer:

25

Step-by-step explanation:

5+7 is 12, 60 divided by 12 is 5.   5x5 is 25

Answer: x = 5, -5

Step-by-step explanation:

Solve using the quadratic formula.

Multiply amount sold by commission rate:

4500 x 0.13 = 585

She made $585 last week.

Multiply amount made in 1 week by 52 weeks ( 1 year = 52 weeks)

585 x 52 = 30,420

She made $30,420 in 2011

Answer:

(x+1)(x+5)(5x−1)

x= 1/5, -5, -1

Step-by-step explanation:

5x^3+29x^2+19x-5

factor

(x+1)(x+5)(5x−1)

the zeros are

x+1=0

x=-1

x+5=0

x=-5

5x-1=0

5x=1

x=1/5

maybe this helps

Answer:

62

Step-by-step explanation:

(82-2)-2× 3^7 ÷ 3^3

___________

3^2

80 - 2 × 3^4

_________

3^2

80 - 2 × 3^2

80 - 2 × 9

80 - 18

62

Answer:

J.)

Step-by-step explanation:

if you make there width to their length a ratio - like for the top you would do 8/2 - then the bottom is different. They all simplify to 4/1 except the bottom.

12/3 = 4/1

2/.5 = 4/1

10/2.5 = 4/1

10/4 = 5/2

Answer:

Step-by-step explanation:

-0.51x+0.21x=6.3  combine like terms

-0.3x=6.3  divide by -0.3

x= -21

Answer:

96 pizzas

Step-by-step explanation:

First, we have to determine how many pizza he can make in one minute = 8/15 = 0.533

Convert 3 hours to minutes = 3 x 60 = 180 minutes

The number of pizzas he would make in 3 hours = 180 x 0.533 = 96 pizzas

Answer:

Not Linear.

Step-by-step explanation:

Answer:

5/4 slope

-7 y intercept.

Step-by-step explanation:

The slope is the number in front of the x. The number in front of the x is 5/4. The slope is 5/4

1. The y intercept is whatever is behind the x or 0 if there is no number following the x.  

2. The y intercept is also characterized by being on the same side of the equation as the x.

3. Finally it has no x in it.

In this case the y intercept is -7

Examples

y + 2 = x    2 is not the y intercept. subtract 2 from both sides. y = x - 2. Therefore -2 is the y intercept.

2y = 4x + 6                4 is not the slope. You have to divide by y = 2x+3. So 2 is the slope and 0,3 is the y intercept.

Answer:

Answer:

The two numbers are 8 and 5

Explanation:

8 - 5 = 3

8 + 5 = 13

Hope this helps!

Answer:

2x+7

Step-by-step explanation:

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

F(x+3)= 2x+6 +1 =2x+7

Answer:

$671.25

Step-by-step explanation:

To get the amount by which the stock have reduced after 2 years, we will use the interest formula;

Interest = Principal * rate * time/100

Interest = 750*5 1/4 * 2/100

Interest = 750*21*2/400

Interest = $78.75

This means that the value of the stock has reduced by $78.75 after 2 years;

Amount that the stock worth now = $750 - $78.75

Amount that the stock worth now = $671.25

Step-by-step explanation:

p = 0.38

0.38 × 5

= 1.9

hope it helpful