Mathematics Middle School

Please help

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first question:

Which mathematical property is demonstrated?

5⋅7⋅4=5⋅4⋅7

associative property of addition

commutative property of addition

commutative property of multiplication

associative property of multiplication

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2nd question:

Which expressions are equivalent to 4⋅(7⋅y)?

(choose all correct answers)

1. (7⋅y)⋅4

2. 4⋅7+4⋅y

3. (4⋅7)⋅y

4. 28y

5. 4⋅7⋅4⋅y

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Last question
is 3(a−b) and 3a−3b Equivalent? yes/no

is 2a(2+b) and 4ab Equivalent? Yes/no

THANK YOU!!!

Answers

Answer 1

Answer:

commutative property of multiplication

.........................

1, 3, and 4

................................................................

yes

Answer 2

1. Commutative property of multiple cation
2. 1; 3; 4
3. Yes; no

Related Questions

Help, offering 20 points and brainliest for correct

Answers

Answer:

a= 1 b= 7

Step-by-step explanation:

X^2y12/ xy^5

= x^2–1 • y^12–5

= xy^7

Answer:

[tex]xy^7=x^ay^b[/tex]

Step-by-step explanation:

[tex]\frac{x^2(y^3)^4}{xy^5} = x^a * y^b[/tex] = [tex]\frac{x^2(y^12)}{xy^5} = x^a * y^b[/tex]

[tex]\frac{x^2(y^12)}{xy^5} = x^a * y^b[/tex] = [tex]\frac{x^2(y^7)}{x} = x^a y^b[/tex]

[tex]\frac{x^2(y^7)}{x} = x^a y^b[/tex] = [tex]x^1y^7 = x^ay^b[/tex]

[tex]x^1y^7 = x^ay^b[/tex] = [tex]xy^7=x^ay^b[/tex]

Mrs. Bailey has a flower garden 56 are pink, and 121 are blue. ½ of the pink flowers are blooming. ⅓ of the blue flowers are blooming. How many flowers does Mrs.Bailey have that ARE BLOOMING in her garden.

Answers

Answer:

Step-by-step explanation:

If you are using decimals then it would be 68.3 flowers blooming if not then you would round and the answer would be 68 flowers :)

The dot plot shows predictions for the winning time in the 200-meter sprint. The winner finished the race in 22.3 seconds. What is the greatest percent error among the predictions?

Answers

Answer:

3.2%

Step-by-step explanation:

Answer:

The required greatest percent error among the predictions is 1.773% (Approximately 1.8%).

Step-by-step explanation:

Given that,

The dot plot shows predictions for the winning time in the 200-meter sprint.
The winner finished the race in 22.5 seconds.

We have to determine,

What is the greatest percent error among the predictions.

According to the question,
The true finishing time is 22.5 seconds.
The prediction furthest from this is 22.9 seconds.
This is a difference of 22.9 - 22.5 = 0.4 seconds.

Divide this over the true time value to get prediction,
0.4/22.5 = 0.0177 = 1.77 (Approximately)

Move the decimal point to the right 2 spots to get to 1.773% (Approximately 1.8%).

Hence, The required greatest percent error among the predictions is 1.773% (Approximately 1.8%).

Hope my answer helps you.

Please mark my answer as the BRAINLIEST. Plssssssssssssssssssss

(Please look at the NUMBERS below the picture)
Priya drew a circle whose circumference is 20 m. Match all dimensions to this circle. There is one answer that does not match.

BRAINLIEST WILL BE INCLUDED!!!! Thank You!

Answers

This is what I got
Area= 31.83 rounded would be 32
Radius= 3.18 rounded would be 3
Diameter= 6.37 rounded would be 6

elp meEeEeEeEEeEEe plzzz

Answers

Answer:

1. 6/15, or 2/5.

2. Apples cost more per pound.

Step-by-step explanation:

1. Brian reads 2/15 in 20 minutes, like we were told. It's easy to determine how much of his book he can read within an hour, by using the ratio 1/15:10. There's clearly 1/15 in 10 minutes, 2/15 in 20, 3/15 in 30, and so on. This would result in him reading 6/15's of his book in an hour.

Peaches

0.6÷8/5 converts to .6 × 5/8. The result is .375.

Apples

1.75 ÷7/2 converts to 1.75×2/7. The result of this equation is .5, so therefore, the apples cost more per pound.

8/15 because 2/15 *3 is 6/15 + 2 is 8 and you multiply by 3 because 60/20=3

Last year there were 205 ducks living on the pond. This year there are 20 % more ducks living on the pond. Is this a percent increase or decrease? *

Answers

Answer:

This is an increase.

Step-by-step explanation:

It says 20% *more* ducks which means the number is getting bigger.

Answer:

I think decrease

Step-by-step explanation:

20%/205= 0.000975

Help again....... Giving 20 brainly 's

Answers

Answer: cant really see the words and my laptop makes it really blurry already

Step-by-step explanation:

that is right ! :)))

My daughter need help on this and I am not good at telling time like that

Answers

Answer:

7:42

Step-by-step explanation:

Answer:

The time is 7:37, you can tell because the smaller hand is close to the 8 but it is not on the 8 just yet because the big hand has not passed 12

Step-by-step explanation:

c÷2 when c=26
help me, please

Answers

Answer:

the answer would be 13

Step-by-step explanation:

26/2=13

Answer:

Step-by-step explanation:

ita just 26 divided by 2. Hope this helps :)

solve for x
6x - 4 + 5 = 37
x=what

Answers

Answer:

Step-by-step explanation:

The sum of Bernice’s age and her
mother’s age is 63. Bernice is 21. What is her mother’s age?

Answers

Answer:

her age would be 42

Step-by-step explanation:

63-42=21

42 this is because 63-21=42

Which value is in the domain of f(x)?

f(x) = StartLayout Enlarged left-brace 1st row 1st column 2 x + 5, 2nd column negative 6 less-than x less-than-or-equal-to 0 2nd row 1st column negative 2 x + 3, 2nd column 0 less-than x less-than-or-equal to 4

–7

–6

4

5

Answers

Answer: C: 4

Step-by-step explanation:

The domain of the function f(x) is: -6 < x ≤ 4, and the value that is in the domain of the function f(x) is 4

How to determine the value in the domain?

The function is given as:

f(x) = 2x + 5, -6 < x ≤ 0

f(x) = 2x + 3, 0 < x ≤ 4

The above means that the domain of the function f(x) is:

-6 < x ≤ 0 and 0 < x ≤ 4

When combined, we have:

-6 < x ≤ 4

This means that x is greater than -6 but does not exceed 4

Hence, the value that is in the domain of the function f(x) is 4

Answers

Answer:

40000000000 Or 4 x 10¹⁰

Step-by-step explanation:

If See The First Number You See 38 And Round 38 To The Nearest 10 And You Get 40, So Just Make The Number You Have 40000000000 Or 4 x 10¹⁰

Jeremiah opened a savings account with a one-time deposit of $500. His savings account will pay a 5% simple interest per year. His brother, Brian, opened another savings account with a one-time deposit of $200. Brian’s savings account will pay 3% compounded annually. Who would earn more interest, to the nearest dollar, in 2 years?
A.
Jeremiah will make $50 more than Brian.

B.
Brian will make $212 more than Jeremiah.

C.
Jeremiah will make $38 more than Brian.

D.
Brian will make $12.00 more than Jeremiah.

Answers

Answer:

Step-by-step explanation:

its just simple math

A I’m only doing this for my own question but yea

A doctor conducts an experiment to test new treatments for a medical condition. Of the 16 volunteers in the experiment, 4 do not receive any treatment. What percent of the volunteers do not receive any treatment?

% ?

Answers

4/16 do not receive treatment
which is 25%

25% do not receive treatment

An alrplane descends 1.6 miles to an elevation of 7.75 miles. Find the elevation of the plane before its descent.

Answers

Answer:

9.35 miles

Step-by-step explanation:

You have to add 1.6 and 7.75

1.6 + 7.75 = 9.35

its elevation before its descent is 9.35 miles

Ishaan is 222 times as old as Christopher. 353535 years ago, Ishaan was 777 times as old as Christopher.

Answers

Answer: I'd say 10 but I'm not that good at math.

Step-by-step explanation: 2 x 35 = 70, 70 / 7 = 10.

My other way of doing it: 7 / 35 = 5, 5 x 2 = 10

HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer: The scale factor is 2

(2 as a fraction is 2/1)

Answer:The scale factor is 2

Step-by-step explanation:

need help, please
brainly

Answers

Answer:

Step-by-step explanation:

The answer is A.:)..

Help me do this. I am confused.

Answers

Answer:

btw plz dont report me

Step-by-step explanation:

how many problems????

The dimensions for the rectangle marked 'B' are _____ centimeters and _____ centimeters.

8, 12
3, 8
3, 5

Answers

Is there a picture to go with this?

Answer: a. 8, 12

Step-by-step explanation:

Basing on the picture above, you can readily determine the dimension of the rectangle B.

Its width is 12 cm and its length is 8cm.

Simplify -2[9 - (x + 7)].

-32 - x
-4 - x
-4 + 2x
-32 + 2x

Answers

-2(9 - x - 7)
= -2(2 - x)
= -4 + 2x

Answer:
-4 + 2x

Simplify using the Laws of Exponents
not hard :]
but i cant do it XD

Answers

Answer:

j11

Step-by-step explanation:

I will mark best answer brainliest

Answers

Answer: -1

Step-by-step explanation:

-8 (-8x - 6) = -6x - 22

distribute

64x + 48 = -6x -22

get rid of the smallest x by adding 6x to both side

70x + 48 = -22

minus 48 to both sides

70x = -70

divide both side by 70

x = -1

X = -1

Lol im not getting brainliest but I’ll Write this anyway

Simplify the expression

-5.5(2 - 6x) - 2.5x

Answers

Distribute -5.5(2-6x) first
-5.5 x 2 = -11 & -5.5 x -6x =33x
=> 33x - 11

33x - 11 -2.5x
subtract common like terms
33x - 2.5x = 30.5x

Answer: 30.5x -11

Choose the set of equivalent fractions that correctly uses the LCD for these fractions: 2/9 and 5/12

Answers

The answwer would be4/6 and 1/6

Which graph shows a proportional relationship between the number of hours of renting a lawn mower and the total amount spent to rent the lawn mower?

Answers

Answer:

Step-by-step explanation:

the 1 one

I think the answer is probably 1

finding the square units of triangle. how would i find this?

Answers

Answer:

616

Step-by-step explanation:

multiply them each number

Answer:

product of the base the and height divided by 2

14*4/11

=28

Step-by-step explanation:

I will mark brainliest if correct

Answers

Answer:

E)40 Mrs. White

Step-by-step explanation:

do you need an explanation?

Which of the following numbers is written in scientific notation?
A. 17
B. 17 × 106
C. 3.734 × 10–14
D. 3.734

Answers

Answer:

i think is b

Step-by-step explanation:

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