Why do we need to rewrite subtraction as addition when we are doing algebra

Answers

Answer 1

Answer:

It is important to learn how to recognize situations and represent them symbolically on counting whole numbers


Related Questions

8 people want to share a large pizza.Use a ratio to express how many pieces each person gets if the pizza is divided equally

Answers

Answer:

1/8

Step-by-step explanation:

Find the slope of 0,5 2,3 ​

Answers

Answer:

y = -x + 5

0 is 0, +5 = 5

-2 + 5 = 3

Husam works at a music store.Last week,he sold 6 more than 3 times the number of CDs that she sold this week.Husam told a total of 110 CDs over the last 2 weeks.How many CDs did husam sell last week?How many CDs did husam sell this week

Answers

Answer:

84 CDs last week and 26 CDs this week

Step-by-step explanation:

84 cds last week and 24 cds last week

Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.

Kendra's Bakery recently spent a total of $134 on new equipment, and their average hourly operating costs are $20. Their average hourly receipts are $22. The bakery will soon make back the amount it invested in equipment. How many hours will that take? What would the total expenses and receipts both equal?​

Answers

135/2=67hours
20*67+22*67=2820

Which number is an irrational number?
A.) 3.5
B.) √36
C.) √48
D.) 37/100

Answers

A because the others are fractions and not a whole number

Answer:

the answer is c

Step-by-step explanation:

square root of 36 = 6 = 6 / 1D. 37 / 100 is already a fraction. Hence, the only number that cannot be written as a fraction is the square root of 48. The answer is C: the square root of 48 is an irrational number.

Help me please!!!!!!!

Answers

Answer: A & D

Step-by-step explanation:

Answer:

It would be A and D.

Step-by-step explanation:

Was this the answer you were looking for??


Which equation matches the function described by the table?
A)y = 5x

B)y=x+2

C)y = 5x + 2

D)y 6x-1

Answers

The actual answer is C. y = 5x + 2.

This is the answer because look at the table. I am gonna plug in the numbers.

2 = 5(0) + 2.

7 = 5(1) + 2.

12 = 5(2) + 2.


As you can see all those statements are true.

I don’t know how to explain it without talking and pointing, but basically all you have to do is plug the numbers into the equations and see which one is true.

Will give brainliest and 20 points!
Evaluate 2-(-4)+3+(-6)-(-2)

Answers

Answer:

5

Step-by-step explanation:

2-(-4)+3=9

9+(-6)-(-2)=5

Answer:

5

Step-by-step explanation:

2-(-4)+3+(-6)-(-2)      if a negative is next to a negative number then It'll be a            positive

2+4+3+(-6)+2

6+3+(-6)+2

9+(-6)+2

11+(-6)

5

HELP DUE IN 15 MINS! Finish the statement. Corresponding angles of similar figures are??

Answers

Answer:

congruent

Step-by-step explanation:

Two triangles are said to be similar if their corresponding angles are congruent and the corresponding sides are in proportion .

Can you just make it as simple as possible please

Please don’t answer unless you know

Answers

Answer:

The light blue one -- second from the left.

x = 14 ; y = 7√2

Step-by-step explanation:

This is a right triangle. One of the angles is 45. So is the other base angle.

So one of the legs is 7√2. The other leg is also 7√2 because they are opposite equal angles.

The hypotenuse is

a^2 + b^2 = c^2

a = b

2a^2 = c^2

2 (7√2)² = c^2

2 49 * 2 = c^2

4 * 49 = c^2

c^2 = 196

c = 14

x=14 y=7\/2 i believe

Which of the following is the correct vertex form of the quadratic
f(x)=x²+2x-5 ?

A fx) = (x+1)^2 + 6
B f(x)=(x-1)^2 -6
C f(x) = (x + 1)²-6
D f(x) = (x - 1)^2+6

Answers

Answer:

C

Step-by-step explanation:

John did an experiment pulling marbles out of a bag, without knowing the contents of the bag. After performing
20 trials, John had pulled 3 red marbles, 11 blue marbles, and 6 orange marbles. He knows that there are 10
marbles in the bag. How many orange marbles could he expect to pull if he performed a new trial with a total of
1,000 trials?

Answers

Answer:

300

Step-by-step explanation:

A punch bowl contained 2 liters of ginger ale, 1 liter of orange juice, and 1 liter of cranberry juice. Select all of the statements that are true. (Choose 2) 2 points The ratio of ginger ale to the entire punch bowl is 1 to 4. The ratio of orange juice to ginger ale is 2 to 1. The ratio of juices to ginger ale is 2 to 2. The ratio of the entire punch bowl to the juices is 2 to 4. The ratio of orange juice to the cranberry juice is 1 to 1.

Answers

Answer:

The ratio of juices to ginger ale is 2 to 2

The ratio of orange juice to the cranberry juice is 1 to 1

Step-by-step explanation:

Ginger ale = 2 liters

Orange juice = 1 liter

Cranberry juice = 1 liter

Total ratio = 2 + 1 + 1 = 4

The ratio of ginger ale to the entire punch bowl is 1 to 4.

Ginger ale : entire punch bowl

= 2 : 4

= 1 : 2

Not true

The ratio of orange juice to ginger ale is 2 to 1.

Orange juice : ginger ale = 1 : 2

Not true

The ratio of juices to ginger ale is 2 to 2.

juices : ginger ale = orange juice + cranberry juice : ginger ale

= 1 + 1 : 2

= 2 : 2

True

The ratio of the entire punch bowl to the juices is 2 to 4.

Entire punch bowl : juices 4 : 2

Not true

The ratio of orange juice to the cranberry juice is 1 to 1.

Orange juice : cranberry juice = 1 : 1

True

the geometric mean of 2 numbers is 20. one of the numbers 50. what is the other
number?

Answers

Answer:

8

Step-by-step explanation:

Let x = the unknown no.

Then

[tex]\frac{50}{20} = \frac{20}{x}[/tex]

50x = 400

 x = 8

If the geometric mean of two numbers is 20, one number is 50 then the other number is 8

What is geometric mean?

"The geometric mean is the average rate of return of a set of values calculated using the products of the terms."

Formula to calculate geometric mean is

[tex]GM = \sqrt{x_{1}.x_{2} }[/tex]

Here,

GM = 20

[tex]x_{1}=50\\ x_{2} =?[/tex]

Substitute the values in the formula

[tex]20=\sqrt{50.x_{2} }[/tex]

Squaring on both sides

[tex]400=50(x_{2})\\ x_{2} =\frac{400}{50} \\x_{2}=8[/tex]

Hence, the other number is 8.

To learn more about Geometric Mean here

https://brainly.com/question/10668117

#SPJ2

What is the percent of decrease from 100 to 57?

Answers

Answer: %56 I think

Step-by-step explanation:

This graph represents wages per hour. What are the output values for working 3, 4, and 5 hours?

Answers

Answer:

dont listen to me jus tryna get points

In our hall, there are 10 fans, but only 60% of them are working. Write the number of fans that are out of order?! Pls answerr I need help instantly! Thxs if u answer :))

Answers

Answer:

6

Step-by-step explanation:

There's 10 fans, so each is worth 10%

If 60% of them are not working, that means that 6 fans are not working.

10 - 6 = 4

There are 6 not working fans

and there are 4 working fans

use the expression 8a+16c
PLEASE HELP MEEE

Answers

Answer:

Part A: 8(a+2c)

Part B: -56

How do you solve this?

Answers

Answer:

you do what it says

Step-by-step explanation:

Answer:

850,000

Step-by-step explanation:

Sorry if it's not  the right answer I have not worked on this math for a long time.

What happens to a 44-degree angle if you rotate it 90 degrees counterclockwise?

Answers

Answer:

We will have a new angle [tex]\theta_{new}=143^{\circ}[/tex]

Step-by-step explanation:

If we rotate this angle 90 degrees counterclockwise we just need to add both angles, which means:

[tex]\theta_{new}=44^{\circ} + 99^{\circ}=143^{\circ}[/tex]

Therefore, we will have a new angle [tex]\theta_{new}=143^{\circ}[/tex]

I hope it helps you!

Someone help and plz make sure it’s right :)

Answers

Answer:

A triangle‘s angles should add up to 180 and the given angles sum up to 130 so x + 58 = 50 so x = -8

Hope this helped and brainliest please

Answer:

-8

Step-by-step explanation:

-8+58=50

50+53+77=180

triangles angles should equal 180

If the cost of 25 copies is $5.25, how many copies can be made for $18.90?

Answers

Answer:

I believe 90

Step-by-step explanation:

25÷ 5.25 =4.76

4.76×18.90= 90


Use the distance formula to find the distance between (4, 2) and (3,5). Use:
d=/(x2 – x,)+ (y2 – y.)?
Round to the nearest tenth ,, will mark brainist and will get points

Answers

Answer:

d = sqrt(x2-x1)^2 + (y2-y1)^2

d = sqrt(4-3)^2 + (-3)^2

d=sqrt(1+9)

d=sqrt10

d=3.2

Let me know if this helps!

Answer:3.2 or square root of 10

Step-by-step explanation:

I need help with number 3 please I need to get my grade up.

Answers

Answer:

(correct) arccos47.3°20.57

Step-by-step explanation:

1. The mnemonic SOH CAH TOA tells you the relationship between angle E and the given sides is ...

  Cos = Adjacent/Hypotenuse

  cos(E) = 19/28

  E = arccos(19/28) . . . . the inverse cosine function is used

__

2. E = arccos(19/28) ≈ 47.3°

__

3. You can either use the Pythagorean theorem to find DF, or you can use the sine relation.

  Sin = Opposite/Hypotenuse

  sin(E) = DF/28

  DF = 28·sin(E) = 28·sin(47.268°) . . . . original unrounded answer for E

  DF ≈ 20.57

or ...

  DF = √(DE² - EF²) = √(28² -19²) = √423 ≈ 20.56696...

  DF ≈ 20.57

Substitution:
X + 2y = 13
-2x - 3y = -18

Answers

Answer:

x = -3

y = 8

Step-by-step explanation:

x + 2y = 13    ------------(I)

    x  = 13 - 2y -----------(II)

-2x - 3y = -18 ----------(III)

Substitute x = 13 - 2y in equation (III)

   -2*(13 - 2y)  - 3y = -18

-2*13 - 2y *(-2) -3y = -18

  -26  + 4y  - 3y    = -18             {Combine like terms}

               -26 + y =  -18     {Add 26 to both sides}

                         y = -18 + 26

                         y = 8

Substitute y = 8 in equation (II)

x = 13 - 2*8

  = 13 - 16

x = -3

x = -3

y = 8

Zander uses an on-line store that sells songs for $1 each and movies for $6. He used all of his $20 allowance to buy 10 items. How many songs and how many movies did he buy?

Answers

Answer:

2 movies and 8 songs

Step-by-step explanation:

use the formula 1x + 6x = $20 and x + x = 10. so x has to equal to 10, so 1 times 8 is 8 and 6 times 2 is 12. The x’s (8 and 2) equal 10 which is what you were looking for. i don’t know if that made sense but i hope it did

How many solutions does the system have?
You can use the interactive graph below to find the answer.
{
21
x
+
6
y
=
42
7
x
+
2
y
=
14










21x+6y=42
7x+2y=14


Choose 1 answer:
Choose 1 answer:

(Choice A)
A
Exactly one solution

(Choice B)
B
No solutions

(Choice C)
C
Infinitely many solutions

Answers

Answer:

wait ok

Step-by-step explanation:

Answer:

C. Infinitely Many Solutions.

Step-by-step explanation:

Look at attachment:

Hope this helps! :)

Can someone please help me with math

Answers

Answer:

D

Step-by-step explanation:

Answer:

undefined

Step-by-step explanation:

The slope of a vertical line is undefined

what is 5/6 plus 3/4

Answers

Answer:

it will be a mixed number

1 7/12

h + 3 = -13
please show work

Answers

H= -16

Step-by-step explanation:

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