why can you use addition to check a subtraction

Answers

Answer 1
So let's say the problem is 5 - 3, to keep it simple. The answer is 2. To use addition to check you would add 2 + 3 = 5. You can add the smaller numbers to get the one larger number. You can also do it with multiplication and division. For example, 5 * 3 = 15. You can divide 3 by 15 and get 5 or do 5 by15 and get 3.
Answer 2
Subtraction is the inverse (opposite) of addition. If the sum of the addition problem equals the number you subtracted from, the answer is correct and vice versa. The same goes for multiplication and division. 

Ex:
3 + 5 = 8
8 - 5 = 3 and 8 - 3 = 5

I hope this helps!

Related Questions

Graph ​ y=−5/6x−4 ​. (if you can give me the coordinates)

Answers

the slope is -5/6 and y intercept is -4

 so the first dot  goes on (0,-4)

 the next dot would go

-5/6 x 4 = -29/6

(1,-29/6)


Sofia is learning to knit. After her first three stitches, she had to undo the last two. Then she made three more stitches and again, had to undo the last two. If this pattern continues, how many stitches will Sofia have to make before she has six good stitches?

Answers

I think so 3 times because the first time the total was 2
2*3 is 6
18 stitches I think I don't know use Google. that will help

MS Nelson had 5,280 craft sticks. She gave all of the craft sticks to her 22 students. Each student received the same number of craft sticks. I need the answer to part b and c. I already did a and half of b

Answers

240 and can i get brainlist?
and hope this help you(-;
For B Just take the number that each student had and divide that by 2 and you will get half of the average.
For C it should be the same number because it was split half and half

The sequence that begins with 3, where each succeeding term is twice the preceding term

Answers

what do we have  to find??

please help Graph y= –3x+4 .

Answers

First start at the point 0,4 because the positive is our y-intercept. Then go up three over one to the left till you reach the end of the graph, then go back to 0,4.
Then go 3 down and right one till you reach the end of the graph. And now you got a line!
Y=mx+b
m=slope  (-3)
b=y-intercept   (4)
 

The graph of the equation of line y = -3x + 4 is plotted

Given data ,

Let the equation of line be represented as A

Now , the value of A is

y = -3x + 4

where the equation is in the form of slope intercept

where the y-intercept is given by b = 4

Now , the slope of the line is m = ( y₂ - y₁ ) / ( x₂ - x₁ )

Substituting the values in the equation , we get

Slope m = -3

So , the slope of -3 indicates that for every 1 unit increase in x, the value of y decreases by 3 units. The negative slope means that the line is decreasing as x increases, sloping downward from left to right.

Hence , the equation of line is plotted on the graph

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What is the expression in standard form for 4(2a)+7(-4b)+(3*c*5)

Answers

Hello there!

To write this in standard form, we need to use the formula.

Thus,

The answer is = 8a + 28b - 15c

Best of luck!

How can you do this problem ?? Plz explain

Answers

Hello! I can help you with this! So we can solve this by dividing the room into different shapes. When you’re done dividing, you get a trapezoid, a small triangle, a rectangle, and a larger triangle. Then, we find the measurement of them to solve the problem and the find the area of each shape and then add them up together. Here are the measurements:

Trapezoid: 24, 12
Rectangle: 4, 8
Large triangle: 2, 18
Small triangle: 2, 2

Then, just find the formula for each and hen add them to find the total number of square feet of the floor.

Which of the following is a reasonable estimated answer to the following problem?

989,867 ÷ 999

Answers

990 would be a reasonable guess because you would round 989,867 up to 990,000 and divide that by the number you rounded 999 to (the number your round 999 to would be 1,000) by dividing 990,000 by 1,000 you get 990
990.8578578578578, because there’s going to be more on the other side of the decimal because, the biggger number is in the hundred thousands.

Will give brainliest!!! :)
Thank you

Answers

(-12) + 6/12 = 12/1 + 6/12=18/12=1 6/12 or 1/2
To add the fraction, just find LCD (least Common Denominator), and then combine the two parts to get your answer which is known as 24

What is the equation of this graphed line (-6,-3) (6,-7)

Answers

The equation is a linear equation in y=mx+b format. The slope-intercept linear equation for this line would be y=-0.33x-5

Answer:  [tex]x+3y=-15[/tex]

Step-by-step explanation:

The equation of a line passes through (a,b) and (c,d) is given by :-

[tex](y-b)=\dfrac{d-b}{c-a}(x-a)[/tex]

Then, the equation of a line that passes through (-6,-3) (6,-7) will be :-

[tex](y-(-3))=\dfrac{-7-(-3)}{6-(-6)}(x-(-6))\\\\\Rightarrow y+3=\dfrac{-7+3}{6+6}(x+6)\\\\\Rightarrow\ y+3=\dfrac{-4}{12}(x+6)\\\\\Rightarrow\ y+3=\dfrac{-1}{3}(x+6)\\\\\Rightarrow\ 3(y+3)=-x-6\\\\\Rightarrow\ 3y+9=-x-6\\\\\Rightarrow\ x+3y=-15.[/tex]

Hence, the required equation is [tex]x+3y=-15[/tex].

Sean and his sister, Betty equally mow 8/9th the total area of a lawn. What fraction of the total area did each of them mow? (Show ur work plz)

Answers

Since they mowed [tex]\frac{8}{9}[/tex] of the lawn in two equal parts, we need to split the pieces that were mowed into two equal groups. We know that in total they mowed 8 out of the total 9 pieces of lawn, so two equal groups that make 8 would be of size 4, since [tex]\frac{8}{2}=4[/tex]. Then they each mowed [tex]\frac{4}{9}[/tex] of the lawn.

Using the division operation, the fraction of the total area mowed by each person is [tex] \frac{4}{9}[/tex]

Total fraction mowed = [tex] \frac{8}{9}[/tex]

Number of persons who mowed the area = 2

Since, the same amount of area ws mowed by each person, then the area mowed per person can be calculated thus :

Total Area mowed ÷ number of persons

[tex] \frac{48}{9} \div 2 = \frac{4}{9}[/tex]

Hence, each person mowed [tex] \frac{4}{9}[/tex]

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You deposit $1,600 in a bank account. Find the balance after 3 years if the account pays 2.4% annual interest compounded quarterly.

Answers

They made $8.8 a hour 

$1803.34 will be the balance after 3 years if the account pays 2.4% annual interest compounded quarterly

What is Compound interest?

Compound interest is the interest on a loan or deposit that accrues on both the initial principal and the accumulated interest from previous periods.

let's call the amount of money A, the initial amount P, the yearly rate r, the number of compounds per year n.

[tex]A = P(1 + \dfrac{r}{n})^{(nt)[/tex]

[tex]A = 1600(1 + \dfrac{.024}{4})^{((4)(5)[/tex]

[tex]A = 1600(1.006)^{(20)[/tex]

[tex]A = \$1803.34[/tex]

Hence $1803.34 will be the balance after 3 years if the account pays 2.4% annual interest compounded quarterly

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What is 1/8 of $68.96

Answers

1/8 x 68.96 = $8.62

hope this helps

at the movie theater, at least 60% of the seats must be full to recover operating costs. on Thursday 146 out of 200 seats are occupied. How many seats are occupied? What percentage of the seats are unoccupied?

Answers

146 seats are occupied. 27% of the seats are unoccupied.

Sophie and Eleanor are making bouquets using daisies and tulips. Each bouquet will have the same total number of flowers,Eleanor uses fewer daisies in her bouquet. than sophie. Whose bouquet will have the greatet ratio of daisies of total flowers? Explain.

Answers

Sophie will have a greater daises to total flowers ratio than Eleanor. To make this easier to see, let's assume the boquets have 10 flowers each, and Eleanor uses 2 daisies and 8 tulips, while Sophie uses 5 daisies and 5 tulips. Then Eleanors ratio is 2:10=1:5, while Sophie's ratio is 5:10=1:2.

Answer:

Sophie's ratio is greater.

Step-by-step explanation:

Sophie and Eleanor are making bouquets using daisies and tulips. Each bouquet will have the same total number of flowers.

Eleanor uses fewer daisies in her bouquet than Sophie.

Lets say the total flowers used in each bouquet is 15.

Eleanor uses 5 daisies. So, her ratio for daisies to total flowers become = [tex]\frac{5}{15}=\frac{1}{3}[/tex]

Suppose Sophie uses 10 daisies so her ratio becomes = [tex]\frac{10}{15}=\frac{2}{3}[/tex]

Now comparing both ratios, we can see that Sophie's ratio is greater.

Determine if you can use the HL Congruence Theorem to prove the triangles to prove the triangles below are congruent.

Answers

a
No you cannot use HL to prove the triangles are congruent because there is no way to know if the hypotenuses of BE and EC are congruent

A pianist plans to play 6 pieces at a recital from her repertoire of 26 pieces. How many different recital programs are possible?

Answers

The number of different recital programs that are possible is 230230 programs

What is combination?

Combinations are also referred to as selections. Combinations implies the selection of things from a given set of things. In this case, we intend to select the objects.

Combination formula:

ⁿCr = n! / ((n – r)! r!)

n = the number of items.

r = how many items are taken at a time

The information will be illustrated as:

= 26! / (26 - 6)! 6!

= 26! / 20!6!

= 230230

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Identify the corresponding word problem given the equation: x - 9.2 = 12.8 A) Nick ran 9.2 miles less than Perry last week. If Nick ran 22 miles, how many miles did Perry run? B) Nick ran 12.8 miles less than Perry last week. If Nick ran 9.2 miles, how many miles did Perry run? C) Perry ran 9.2 miles less than Perry last week. If Nick ran 12.8 miles, how many miles did Perry run? D) Nick ran 9.2 miles less than Perry last week. If Nick ran 12.8 miles, how many miles did Perry run?

Answers

The correct answer is D

Nick ran 9.2 miles less than Perry last week. If Nick ran 12.8 miles, how many miles did Perry run?

x - 9.2 = 12.8

x = 12.8 + 9.2

x = 22

Perry ran 22 miles for the week, 9.2 miles more than Nick.

Answer:

correct answer is D

Step-by-step explanation:

How much would $200 invested at 7% interest compounded annually be worth after 5 years? Round your answer to the nearest cent.

Answers

Use the Compound Amount formula:

A = P (1 + r)^t, where P is the principal, r is the interest rate as a decimal fraction, and t is the number of years.

Here, A = $200 (1 + 0.07)^5    =    $500(1.07)^5    =   $280.51.

The interest earned would be $80.51.

Answer:

280.51

Step-by-step explanation:

a cube has a volume of 8 cubic inches what is the length of each edge of the cubes

Answers

Answer:

The formula for the volume of the cube is v=a3 where a is the length of the edge the volume of the cube is 1/8 cube inches v= 1/8 cube inches a3=(1/2)3 cubic inches

Step-by-step explanation:

Two numbers have a distance of 5 units from 0 on a number line. The numbers can be graphed on the number line as points A and B.

Drag and drop the labels to the correct positions on the number line.

Answers

Drag A to negative 5 and B to positive 5.

Answer:

Point A is labeled at x=-5 and point B is labeled at x=5.

Step-by-step explanation:

It is given that two numbers have a distance of 5 units from 0 on a number line.

Let the unknown number be x.

Case 1: x is 5 units less than 0.

[tex]x=0-5[/tex]

[tex]x=-5[/tex]

The point A is labeled at x=-5.

Case 2: x is 5 units more than 0.

[tex]x=0+5[/tex]

[tex]x=5[/tex]

The point B is labeled at x=5.

Give an example of an area. You would measure in square miles

Answers

The block of your neighborhood

Darius flipped a coin 500 times and it landed heads up 300 times. What is the relative frequency of the coin landing heads up based on the results of this experiment?

Answers

300/500 is the probability. Is it correct?
3/5 times. in reality it should have landed 250 times as in an ideal world you get 50/50 odds of getting one side or the other

The manager of a plant nursery bought 120 lb of soil to use for potting plants. The manager can put 5 lb into each of the small pots and 12 lb into each of the large pots. The manager made a sketch to show the line representing the different combinations of pots that can be used. The x-axis represented the number of small pots and the y-axis represented the number of large pots. The manager labeled only the intercepts.


Which points did the manager label?




1. (0, 12) and (5, 0)


2. (0, 10) and (24, 0)


3. (0, 24) and (10, 0)


4. (0, 5) and (12, 0)

Answers

The intercept are the number of each of the pots used when no soil was put in the other pot.
When no soil was put in the large pots, then 120/5 = 24 small pots will be filled.
When no soil was put in the small pots, then 120/12 = 10 large pots will be filled.

THerefore, the points labelled are (24, 0) and (0, 10)
Final answer:

The points that were labelled by the manager on the graph are (0, 10) and (24, 0). These points are found by dividing the total amount of soil by the amount of soil required by each type of pot.

Explanation:

In this Mathematics problem, we need to determine which points were labelled on the graph created by the nursery manager representing combinations of small and large pots. We can find these points, the intercepts, by understanding that these occur when one variable is zero. The x-intercepts happen when all soil is used for large pots (i.e., the y-axis, or number of small pots, is zero), and the y-intercepts occur when all the soil is used for small pots (i.e., the x-axis, or number of large pots, is zero). For the x-intercept, if each large pot requires 12lb of soil, then the manager could fill 120/12 = 10 large pots if no soil is used for small pots. Therefore, the x-intercept is (0, 10). Similarly, the y-intercept would be obtained by dividing the total amount of soil with the amount used for a small pot. That gives us 120/5 = 24. Hence, the y-intercept is (24, 0). So, the points labelled by the manager are option 2: (0, 10) and (24, 0).

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What is the GCF of 32a and 48b??

Answers

i think that the answer is 4

16 is the greatest common factor

A ferry traveled 1/6 of the distance between two ports in 3/7 hour. At this rate, what fraction of the distance between the two ports can the ferry travel in one hour?

Answers

(1/6) / (3/7) = x / 1......1/6 distance to 3/7 hr = x distance to 1 hr
cross multiply
(3/7)(x) = (1/6)(1)
3/7x = 1/6
x = (1/6) / (3/7)
x = 1/6 * 7/3
x = 7/18 <=== 7/18 of the distance in 1 hr

What is eight worth in 8.517

Answers

It’s worth 8 no joke. It’s in the ones place

Marcia buys a dress that is on sale for 15% off it's original price. She uses a store coupon to obtain an additional 10% off the sale price. Marcia pays $91.80 for the dress. What was the original price of the dress?

Answers

15% off the original price
10% off the sale price
Sale price $91.80 

First we have to find out the price before 10% discount. 
(sale price) divided by (1 - percent of sale price)

91.80/(1 -.10) = $102

So, $102 was the price before the 10% discount. Now we need to do the same with the 15% off so that we can get the original price.

102/(1 - .15) = $120 

The original price was $120

Answer:

120$

Step-by-step explanation:

We must calculate the prices with the application of discounts successively

The last discount he got was 10%, so $ 91.80 equals 90% of the price

We calculate the price before this discount by applying with a simple rule of three

[tex]90 \% \longrightarrow 91.80\\100\% \longrightarrow x\\x=\frac{(100)(91.80)}{90}\\ x= 102\$[/tex]

She pays $ 102 with a 15% discount, so this value equals 85% of the original price

We calculate the price before this discount by applying with a simple rule of three

[tex]85\% \longrightarrow 102\\100\% \longrightarrow x\\x=\frac{(100)(102)}{85}\\ x= 120\$[/tex]

What two integers is 87 between

Answers

the two integers 87 between is 86 87 89

Answer:

43 and 44

Step-by-step explanation:

im giving 50 points
 Solve the equation.
-4(3 - 2x) + 2x = 2x - 8
A) x = 2
B) x = -1
C) x =
1
2
D) x =
1
3

Answers

-12+8x+2x=2x-8
10x-12=2x-8
8x=4
x=1/2
C
it is probably answer B
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