how can you use a mental math and the inverse property of addition to find the sum [5.5 + (-2.3)] + (-5.5 + 2.3)?

Answers

Answer 1
Hi you can do 5-3 is two then 5-2 is three so you get 3.2 then go to the either side and do 5-3 that equaled two and then do 5-2 that is three so you 3.2 then you add both of them together to get 6.4
Answer 2

Answer: it is 0

Step-by-step explanation:

[5.5+(-2.3)] + (-5.5+2.3)

We can multiple (-5.5+2.3) by -1 so that it equals the first expression

[5.5+(-2.3)] + (-1)[5.5+(-2.3)]

Then, we change the + to -

[5.5+(-2.3)] - [5.5+(-2.3)]

since we are subtracting the same value, the answer is 0.


Related Questions

Write a decimal ;twenty three hundredths

Answers

0.23

First decimal place is the tenths, second is the hundredths

Answer:

0.23

Step-by-step explanation:

i know math

helpppp pleaseee fastttttttttt

Answers

Answer: 2 and

Step-by-step explanation: equation 2:

3(3x+4)-5=9x-2

9x+12-5=9x-2

9x+7=9x+-2

Subtract both sides by 9x

7=-2

This Is not true therefore there is no solution

equation 3:

3(3x+4)-5=-3x+4

9x+12-5=-3x+4

9x+7=-3x+4

12x=-3

divide both parts by -3

x=-4

A pitaya, or a dragon fruit, is a tropical fruit with pink skin and pulp filled with tiny black seeds. The weight of a pitaya seed is 1 x 10-^3 ounce. What is the weight of the pitaya seed in standard form?

Answers

Answer:

the answer is 7 beacuse 1×10-"3

The diagram shows the plan for a lawn. A landscaper needs to

buy grass seed to cover the lawn. One bag of grass seed covers

an area of 900 yd2. How many bags of seed does the landscaper

need to buy to cover the lawn? Show your work.

Answers

Answer:

10

Step-by-step explanation:

90-54=36

36*14=504

504*2=1008 squared

90*whatever the side length is

add 1008 to that answer but it is all squared

then divided your answer by 900, any leftovers, add it on as another bag.

Part I-Selected Response
1. CJ wrote several pairs of values that he
thought were equivalent. Which of his
equations are correct? Circle all that apply.
A. 1.25-125%. B. 0.03-30%
C. 0.001 - 1% D.
E. -50%

2. What is 30% of 60?
A. 18
B. 20
C. 24
D. 30
B. 0.03-30%
D. -60%
F.
D. 200

3. Six is 3% of what number?
A. 0.18
B. 2
C. 18

4. What percent of 40 is 60?
A. 20%
B. 50%
C. 67%
D. 150%


5. What is the percent decrease from 20 to
16?
A. 4%
B. 20%
C. 25%
D. 125%

6. Last year, 15 dogs entered the local dog
show. This year, 20 entered. What is the
percent increase?
A. 20%
B. 25%
C. 33%
D. 75%

7. Roe bought a video game in Miami. The
game was $30. Miami has a 7% sales tax.
How much money did Roe pay for the video
game including sales tax?
A. $32.10
B. $33.50
C. $37.00
D. $51.00

8.Lia bought a new jacket. The original price
of the jacket was $48 but it was on sale for
15% off. For numbers 8a-8d, determine
whether each statement about Lia's
purchase is true or false.
8a. Lia paid more than $48
for the jacket.
8b. The discount was $7.20.
8c. Lia paid $40.80 for the
jacket.
8d. Lia paid $55.20 for the
jacket.
8a. TRUE FALSE
8b. TRUE FALSE
8c. TRUE FALSE
8d. TRUE FALSE

Answers

1. A

2. A, 18

3. 200

4. D

5. B

6. B

7. A

8a. False
8b. True
8c. True
8d. False

1) A
2)A , 18
3)200
4)D
5)B
6)B
7)A
8a)f
8b)t
8c)t
8d)f

Simple figures review

Answers

Answer: B. 40 inches per cm.

Step-by-step explanation:

Step 1: Divide 60 inches by 5 cm, you get 12.

Step 2: Divide 200 inches by 12.

You get 40 inches per cm.

Your welcome!

Using the easy chili recipe below, what is the unit rate of beans per pound of hamburger? Round to the nearest hundredth if necessary.

Answers

let me see how many we working with

i would say about 69 beans per 420 pounds of hamburger.

Select all ratios equivalent to 16:4 A. 12:3 B. 24:6 C. 48:12

Answers

Answer:

A, B, and C are correct.

Step-by-step explanation:

16:4 is equal to 4:1 when fully simplified

12:3 is equal to 4:1 when fully simplified

24:6 is equal to 4:1 when fully simplified

48:12 is equal to 4:1 when fully simplified

All of the answers are correct as they are all equivalent to 4:1

Answer:  C. 48:12 and B. 24:6

Step-by-step explanation:

48:12    16x3=48        4x3=12

24:6      16x1.5=24     4x1.5=6

equivalent ratios are when two or more ratios express the same relation or comparison of numbers are known as equivalent ratios.

Help plssss.........

Answers

Answer: He has made $72 this week

Step-by-step explanation:

We can set up the equation of Y = 9x where Y is how much he made and X is how many hours he worked.

We can simply plug in 8 hours for x to get Y=9(8) where Y=72.

Superior Segway Tours gives sightseeing tours around Chicago, Illinois. It charges a one-time fee of $40, plus $35 per hour. What is the slope of this situation?

A: 80
B: 65
C: 40
D: 35

Answers

Answer: D: 35

Step-by-step explanation:

The Y intercept is equal to $40.

Every hour is $35.

Therfore, the slope is 35.

Every 1 hour is = $35

Hope this makes sense.

D is the answer for the question if you need help I know

Kurt and Courtney are playing basketball. Kurt makes 2 baskets in the first game and 4 baskets in each game after that. Courtney makes 4 baskets in the first game and 2 baskets in each game after that. The table below shows the number of baskets each made in the first 4 games. Which graph shows the ordered pairs of the total number of baskets each has made after each game?

Answers

Answer:

Step-by-step explanation:

3rd graph

Out of 75 students, 45 students said that their favorite ice cream flavor was chocolates. what percentage of students like chocolate ice cream the best?

Answers

Answer: 60%

Step-by-step explanation: just do 45/75 and you get 0.6

Answer: 60

Step-by-step explanation:

multiply

can anyone help answer this question?

it's shown on the picture below. :)

Answers

Answer:

The correct graph is A.

Step-by-step explanation:

-4x/5-13/5 ≥ -9

Multiply the entire equation by 5:

-4x-13 ≥ -45

Moving the -4x:

-13 ≥ -45+4x

Moving the -45:

32 ≥ 4x or 4x ≤ 32

So:

x ≤ 8

The correct graph is A.

The answer would be graph A that describes the solution set.

the perimeter should be 12 cm right?

Answers

Answer: I'm pretty sure

Step-by-step explanation:

Answer: I think so probably

PLEASE HELP!!!!!!A set of data includes 98 data points ranging from 0 – 160. If the data is split into classes with a range of 10 (1 – 10, 11 – 20, etc), and there are no values that fall in the class 81 – 90, what can you say about the data?

1 The mean of the data will not be between 81 – 90.
2 All the data lies below 80.
3 The relative frequency of the class 81 – 90 is 0.
4 The median could be in the range 81 – 90.

Answers

A b c ok a Gabe n m j h
I think the answer is 1 because it can’t be 2 because it goes up to 160. It can’t be the 3rd one because the is no data so it can’t be frequent

Please help me w/ this question!

Answers

Answer:

Step-by-step explanat

Basically to solve this answer you just have to plug in Jamie’s brothers amount of tickets (x) into the equation


So with the first number (40) I would plug it into the equation

3(40)+2 -which is equivalent to 122

So this is how the chart would be filled out




Jamie’s brothers. 32

Which set of numbers includes only integers?

A.Negative 5, negative 3 and one-fourth, 1, one-eighth
B.Negative 3, negative 2, 2, 3
C.Negative 6, negative 4, negative 2, negative one-half
D.One-half, two-thirds, StartFraction 6 Over 7 EndFraction, 0

Answers

Answer:

Gonggong answer munaman Yan ehh

B, integers basically mean whole numbers and B only contains whole numbers

Help??? :/ .................................

Answers

Answer:

A

Step-by-step explanation:

Answer:

I think the answer is a.

Which expression represents the product of x3+2x-1 andx4-x3+3?

PLEASE HELPPPPPA

Answers

Step-by-step explanation:

3+2multiplied by x

=3+2×X

the answer is 3=2+x so yeah

Please help with this question..

Answers

Answer: I don’t know

Step-by-step explanation:

but I’m really broke

Answer:

(9 - v)^7 ?

I'm kinda confused

Can anyone help out with this?

Answers

Answer:

Step-by-step explanation:

It is C) TK
This is because that line does not intersect or touch the line LR, so it is not transversal to it.

please answer fast 20 pts



Your friend just returned to the United States from their trip to Nepal and wants to exchange their 9,362 Nepalese rupees for U.S. dollars. How many dollars will they receive if the current exchange rate is 1 U.S. dollar to 124 Nepalese rupees?


$11.69

$75.50

$93.62

$105.50

Answers

Answer:

Step-by-step explanation:

Your friend just returned to the United States from their trip to Nepal and wants to exchange their 8,153 Nepalese rupees for U.S. dollars. How many dollars will they receive if the current exchange rate is 1 U.S. dollar to 124 Nepalese rupees?

our friend will get $ 65.75 in exchange for 8153 Nepali Rupees.

Currency Exchange rate:

The price of the native currency relative to another currency is referred to as the foreign exchange rate. Comparing different currencies to demonstrate their relative values is the goal of international exchange.

The rate at which one currency is exchanged for another or the price of one currency expressed in terms of another currency is two additional definitions of the foreign exchange rate.                  

Here given that

Your friend is just returned from Nepal to the United States

And wants to exchange 8,153 Nepalese rupees for U.S. dollars

The current exchange rate is 1 U.S dollar = 124 Nepalese Rupee

Let us assume that your friend will get x dollars in exchange

As give that 1 dollar = 124 Nepalese Rupees

Then x dollars = x × 124 Nepalese Rupees

What is m\_JKL in the diagram below

Answers

JKL is the other angle in the corner.  That square means its a 90 degree angle.  

So, to find the other angle, subtract 28 from 90

62

Angle JKL = 90° - 28° = 62°

ALEKS: Teresa is ordering an ice cream dessert. She must order a size, a flavor of ice cream, and a topping. There are 2 sizes, 2 flavors, and 2 toppings to choose from. How many different ice cream desserts could she order?

Thanks!

(and just a heads up, I'm gonna be asking a whole lot of questions from ALEKS)

Answers

Answer:She could offer 8 different ice cream desserts

Step-by-step explanation:

Answer:

8

Step-by-step explanation:

2 x 2 x 2 = 8

Please I need help w/ this question!

Answers

Answer:

Marissa did not change the direction of the inequality sign.

Step-by-step explanation:

Hello!

We can solve the inequality as well, and compare our steps to Marissa's to verify her steps.

Solve the inequality:[tex]-\frac x{12} > 7.8[/tex][tex](-12)\frac{x}{-12} > 7.8( -12)[/tex][tex]x < -93.6[/tex]

We have the same number, but a different inequality sign. This is because we have to flip the inequality sign when multiplying and dividing by a negative number.

Therefore, the answer is the last option, Marissa has to flip the inequality sign when multiplying by a negative number.

Marissa did not change the direction

The table below shows the ratio of materials in a composting container.


Brown Material (gallons) 12.75 18.6 24 E
Green Material (gallons) 4.25 B D 11.5
Total (gallons) A C 32 46


If Jeremy needs 64 gallons of compost to plant his garden in the spring, how much brown material will he need? How much green material will he need?
Jeremy will need 52 gallons of brown material and 12 gallons of green material.
Jeremy will need 16 gallons of brown material and 48 gallons of green material.
Jeremy will need 12 gallons of brown material and 52 gallons of green material.
Jeremy will need 48 gallons of brown material and 16 gallons of green material.

Answers

Answer:

Step-by-step exp6lanation:

On monday, your bank account balance was -$12.58. Because you didn't realize this, you wrote a check for $30.72 for groceries. a) What is the new balance in your checking account? b) The bank charges a $25 fee for playing a check on a negative balance. What is the balance in your checking account after this fee? c) How much money do you need to deposit to bring your account balance back up to $0 after the fee?

Answers

Answer:

a) The new balance in your checking account is -$12.58 - $30.72 = -$43.30.

b) After the bank charges a $25 fee for overdrafting, the balance in your checking account will be -$43.30 - $25 = -$68.30.

c) To bring your account balance back up to $0 after the fee, you will need to deposit $68.30.

Step-by-step explanation:

Answer:

First, you subtract the 30.72 from the -12.58 which is -43.03 which is therefore how much you have in your account. Then we subtract another 25 for the fee. -68.03 Is how much you have after paying the fee.

Therefore, to get to 0, you need to pay 68 dollars and 3 cents.

Step-by-step explanation:

The sum of two numbers is -9. Which expressions could represent the addition problem?

PLEASE HELP

Answers

The answer is B all the others basically go into positive

The correct answer is B:

A cannot be right because -10 -1 is -11

B has to be right because -10 + 1 is -9

C cannot be right because 10 - 1 is 9, but it’s positive

D cannot be right because 10 + 1 is 11

Remember if you have 2 negatives it’s positive, and if you have 1 negative and 1 positive it’s negative

Need help with this lol

Answers

Answer:

D

Step-by-step explanation:

Pythagorean Theorem: a^2+b^2=c^2

6^2+10^2=c^2

36+100=136(radical symbol)

Answer is D

Hope this helps :)

Answer: hope this helps ♡

D) √136 ft.

Step-by-step explanation:

c = hypotenuse

a & b = the two other sides

a² + b² = c²

6² + 10² = c²

36 + 100 = c²

136 = c²

(11.6 = c)

What is the value of x in this triangle? What is the value of each angle?

Answers

Answer:

x=17

Step-by-step explanation:

we know the 25 + 90 = 115 so we need the other one to make it 180 degrees.

180-115= 65

so we need 65 more degrees to get 180

now 3x + 11= 65  first step subtract 11 on both sides

you now get 3x = 54 then 2nd step is divide 3 on both sides

and now you get x=17 so

Answer:

Step-by-step explanation:

The entire value of the triangle is 180 degrees.

If you subtract 25 from 180 you are left with 155

Then Subtract 90 from 155 which will leave you with 65

Go on to subtract 11 from 65 having to be with 54 degrees left

Finally you will dived 54 by 3 and you are left with 18

3 x 18 = 54

54 + 11 = 65

Therefore x will equal to 65 degrees

Other Questions
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