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umka21 [38]
3 years ago
8

PLS HELP ME. Use the opposite operation to undo the

Mathematics
2 answers:
AfilCa [17]3 years ago
4 0

<em>Hey</em><em>!</em><em>!</em><em>!</em><em>!</em>

<em>Here</em><em>'s</em><em> </em><em>your</em><em> </em><em>answer</em><em>:</em>

<em>1</em><em>.</em><em> </em><em>2</em><em>m</em><em>=</em><em>2</em><em>4</em>

<em>or</em><em>,</em><em>m</em><em>=</em><em>2</em><em>4</em><em>/</em><em>2</em>

<em>m</em><em>=</em><em>1</em><em>2</em>

<em>2</em><em>.</em><em> </em><em>y-9</em><em>=</em><em>3</em><em>0</em>

<em>or</em><em>,</em><em>y</em><em>=</em><em>3</em><em>0</em><em>+</em><em>9</em>

<em>y</em><em>=</em><em>3</em><em>9</em>

<em>3</em><em>.</em><em> </em><em>3</em><em>x</em><em>=</em><em>1</em><em>2</em>

<em>or</em><em>,</em><em>X=</em><em>1</em><em>2</em><em>/</em><em>3</em>

<em>x</em><em>=</em><em>4</em>

<em>4</em><em>.</em><em> </em><em>k</em><em>+</em><em>1</em><em>2</em><em>.</em><em>5</em><em>=</em><em>3</em><em>0</em>

<em>or</em><em>,</em><em>k</em><em>=</em><em>3</em><em>0</em><em>-</em><em>1</em><em>2</em><em>.</em><em>5</em>

<em>k</em><em>=</em><em>1</em><em>7</em><em>.</em><em>5</em>

<em>5</em><em>.</em><em> </em><em>3</em><em>r</em><em>=</em><em>1</em><em>5</em><em>.</em><em>3</em>

<em>or</em><em>,</em><em>r</em><em>=</em><em>1</em><em>5</em><em>.</em><em>3</em><em>/</em><em>3</em>

<em>r</em><em>=</em><em>5</em><em>.</em><em>1</em>

<h3><em>Hope</em><em> </em><em>it</em><em> </em><em>helps</em><em>.</em><em>.</em><em>.</em><em>.</em></h3>

<em>Good</em><em> </em><em>l</em><em>uck</em><em> </em><em>on</em><em> </em><em>your</em><em> </em><em>assignment</em>

AnnZ [28]3 years ago
3 0

Answer:

see below

Step-by-step explanation:

1. 2m = 24

Divide each side by 2

2m/2 = 24/2

m = 12

2. y – 9 = 30

Add 9 to each side

y-9+9 = 30+9

y = 39

3. X/4 = 12

Multiply each side by 4

x/4*4 = 12*4

x = 48

4. k + 12.5 = 30

Subtract 12.5 from each side

k+12.5-12.5 = 30-12.5

k =17.5

5. 3r = 15.3

Divide by 3

3r/3 = 15.3/3

r =5.1

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alexi’s restaurant bill is $58, and he wants to leave a 20 percent tip. which expression represents the total amount that alexi
Alexeev081 [22]
He is leaving 20% tip of the bill of $58

20% extra

So total amount = 100% + 20% = 120%

120% of 58

(120/100) * 58

1.2 * 58

= 69.6

So total amount Alexi needs to pay = $69.60
8 0
3 years ago
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Please help me | ty very much if you will :))
denis-greek [22]

answer:

15/8

- this is the simplest form.

<em>-- please mark the brainliest and click the thanks button if correct :)</em>

<em></em>

4 0
3 years ago
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Please help!!!!! Will give brainliest!!
valkas [14]

2.57*10^4 is 1,000,000 times more than 2.57*10^-1

Why?

4-(-1)=5 2

2.57*10^4=25700

2.57*10^-1=0.0257

and

25700

÷ 0.0257

=1000000

and 1000000=10^6

6 0
3 years ago
50 points! help me! Real answers PLEASE!
Alika [10]

Step-by-step explanation:

Your previous questions answer is

v=23

w=19

x=22

y=26

z=20

<em>if</em><em> </em><em>you</em><em> </em><em>satisfied</em><em> </em><em>in my answers please please mark</em><em> </em><em>as brainleiest and follow me</em><em> </em>

4 0
3 years ago
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How do you factor 125-x^3?
xz_007 [3.2K]

Step-by-step explanation:

We have

125 - x {}^{3}

First, 125 is a perfect cube because

5 \times 5 \times 5 = 125

and

x^3 is a perfect cube because

x \times  x \times x = x {}^{3}

so we can use the difference of cubes identity

( {x}^{3}  -  {y}^{3} ) = (x - y)( {x}^{2}  + xy +  {y}^{2} )

Let say we have two perfect cubes:

64 because 8×8×8=64

and 27 because 3×3×3=27 and let subtract

64 - 27

we know that

64 - 27 = 37

but using the difference of cubes identity we should get the same thing.

Remeber cube root of 64 is 4 and cube root of 27 is 3 so we have

(4 - 3)( {4}^{2}  + 4(3) + 3 {}^{2} )

1(16 + 12 + 9) = 1(37) = 37

So the difference of cubes works for real numbers. This is a good way to help remeber the identity using real numbers.

Back on to the topic,

we know that 5 is cube root of 125 and x is the cube root of x^3 so we have

(5 - x)( {5}^{2}  + 5x +  {x}^{2} ) =

(5 - x)(25 + 5x +  {x}^{2} )

3 0
2 years ago
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