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3 years ago

15

Operations that undo each other are called _______ of each other.

2 answers:

suter [353]3 years ago

5 0

Hey there!!

They're called Inverse operation. Such as *multiplication and division* and *addition and subtraction*

Hope this helps. c:

KATRIN_1 [288]3 years ago

3 0

Hi Bryan

Answer : Operations that undo each other are called inverse operation of each other.

I hope that's help !
Sweet dream.

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Solve the following System of Equations<br> 5x+4y-z=1<br> 2x-2y+z=1<br> -x-y+z=2

podryga [215]

Answer:

x = 0 , y = 1 , z = 3

Step-by-step explanation:

Solve the following system:

{5 x + 4 y - z = 1 | (equation 1)

2 x - 2 y + z = 1 | (equation 2)

-x - y + z = 2 | (equation 3)

Subtract 2/5 × (equation 1) from equation 2:

{5 x + 4 y - z = 1 | (equation 1)

0 x - (18 y)/5 + (7 z)/5 = 3/5 | (equation 2)

-x - y + z = 2 | (equation 3)

Multiply equation 2 by 5:

{5 x + 4 y - z = 1 | (equation 1)

0 x - 18 y + 7 z = 3 | (equation 2)

-x - y + z = 2 | (equation 3)

Add 1/5 × (equation 1) to equation 3:

{5 x + 4 y - z = 1 | (equation 1)

0 x - 18 y + 7 z = 3 | (equation 2)

0 x - y/5 + (4 z)/5 = 11/5 | (equation 3)

Multiply equation 3 by 5:

{5 x + 4 y - z = 1 | (equation 1)

0 x - 18 y + 7 z = 3 | (equation 2)

0 x - y + 4 z = 11 | (equation 3)

Subtract 1/18 × (equation 2) from equation 3:

{5 x + 4 y - z = 1 | (equation 1)

0 x - 18 y + 7 z = 3 | (equation 2)

0 x+0 y+(65 z)/18 = 65/6 | (equation 3)

Multiply equation 3 by 18/65:

{5 x + 4 y - z = 1 | (equation 1)

0 x - 18 y + 7 z = 3 | (equation 2)

0 x+0 y+z = 3 | (equation 3)

Subtract 7 × (equation 3) from equation 2:

{5 x + 4 y - z = 1 | (equation 1)

0 x - 18 y+0 z = -18 | (equation 2)

0 x+0 y+z = 3 | (equation 3)

Divide equation 2 by -18:

{5 x + 4 y - z = 1 | (equation 1)

0 x+y+0 z = 1 | (equation 2)

0 x+0 y+z = 3 | (equation 3)

Subtract 4 × (equation 2) from equation 1:

{5 x + 0 y - z = -3 | (equation 1)

0 x+y+0 z = 1 | (equation 2)

0 x+0 y+z = 3 | (equation 3)

Add equation 3 to equation 1:

{5 x+0 y+0 z = 0 | (equation 1)

0 x+y+0 z = 1 | (equation 2)

0 x+0 y+z = 3 | (equation 3)

Divide equation 1 by 5:

{x+0 y+0 z = 0 | (equation 1)

0 x+y+0 z = 1 | (equation 2)

0 x+0 y+z = 3 | (equation 3)

Collect results:

Answer: {x = 0 , y = 1 , z = 3

3 0

4 years ago

Create a ratio table to solve the following rate problem.

Alexxx [7]

90/18 is 5 year so the answe is ( yr

8 0

3 years ago

The next test will be a hundred points total, but only forty questions will be asked. Some questions are worth two points each a

photoshop1234 [79]

Answer:

10 questions that are 4-point
30 questions that are 2-point

Step-by-step explanation:

<em>Numerical reasoning</em>

If all questions were 2-point, the total score would be 80. It is 20 more than that. Each 4-point question that replaces a 2-point question will add 2 points to the score, so there must be 20/2 = 10 of them.

There are 10 4-point questions and 30 2-point questions.

_____

<em>With an equation</em>

Let x represent the number of 4-point questions. Then 40-x is the number of 2-point questions. The total number of points is ...

... 2(40-x) +4x = 100

... 2x +80 = 100 . . . . simplify

... 2x = 20 . . . . . . . . .subtract 80

... x = 10 . . . . . . . . . . divide by 2.

There are 10 4-point questions and 40-10=30 2-point questions.

8 0

3 years ago

The Kroger Company is one of the largest grocery retailers in the United States, over 2000 grocery stores across the country. Kr

yarga [219]

Answer:

A) Categorical

B) Nominal

Step-by-step explanation:

As we can see from the data that the question only had two answers i-e Yes or no so therefore they were categorical rather than quantitative in which he would have asked the user for how much money they were willing to pay more.

It's nominal because he asked in terms of more or less rather than some specific number

4 0

3 years ago

6464 is 444 times the difference between Sarah's age, aaa, and 444444. Assume Sarah is older than 444444. Write an equation to d

zaharov [31]

Answer:

Sarah's age is 60 years

Step-by-step explanation:

<u><em>The correct question is:</em></u>

64 is 4 times the difference between Sarah's age, a, and 44. Assume Sarah is older than 44. Write an equation to determine Sarah's age

Let

a ----> Sarah's age

we know that

The difference of Sarah's age and 44, all multiplied by 4 is equal to 64

so

The linear equation that represent this problem is

$4(a-44)=64$

Solve for a

Apply distributive property left side

$4a-176=64$

Adds 176 both sides

$4a=64+176\\4a=240$

Divide by 4 both sides

$a=60$

therefore

Sarah's age is 60 years

7 0

3 years ago

Read 2 more answers