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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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solve quadratic by taking square roots. as=a,-a where a and -a the values you found when when solving. Round to nearest tenth. 2
attashe74 [19]

Answer:

8.1

Step-by-step explanation:

2x^2 -9 = 121

        +9    +9

2x^2 = 130

/2         /2

x^2   = 65

x= sqrt (65)

x= 8.06225...

x = 8.1

6 0
2 years ago
Simplify 5(a - <br> b. 6(a <br> b. - 7(a - 2b)
Elan Coil [88]
Not sure what you're asking. are you wanting to solve 5 ( a - b), where b equals those two things listed below? If that's the case, I can definitely help. If not, please clarify.
6 0
3 years ago
Please help me!
dybincka [34]

Answer:

They are only equal on day 0, both having 10 population.

Step-by-step explanation:

Given the bacteria on the counter is initially measured at 5 and doubles every 3 days we can generate the following geometric equation:

f(x)=10*2^{\frac{x}{3} }

Given the bacteria on the stove is measured at 10 and doubles every 4 days we can create another equation:

f(x)=10*2^{\frac{x}{4} }

To find how many days it will take for the bacteria population to equal the same lets set both equations equal to eachother:

10*2^{x/3}=10*2^{x/4}

Divide both sides by 10

2^{x/3}=2^{x/4}

Since both exponents have the same base we can set the exponents equal to eachother and solve for x:

\frac{x}{3}=\frac{x}{4}

Multiply both sides by 3 to isolate x on the left side

x=\frac{3x}{4}

Multiply both sides by 4 to remove fraction

4x=3x

Subtract 3x to isolate x on the left side

x=0

Plug x into one of our original equations

f(0)=10*2^{0/3}

Solve

f(0)=10

6 0
2 years ago
At a children's concert there were 80 boys. There were 1 1/2 times the number of girls as boys. What percentage of the total num
beks73 [17]

Answer:

60% are girls

Step-by-step explanation:

80 x 1.5 = 120 which is the amount of girls

120 out of 200 is 12/20 or 3.5 which is 60%

4 0
3 years ago
If a canoe travels with a speed of A mph for 3 hours, and then with a speed of B mph for the rest of the journey, how long does
Mandarinka [93]

Answer:

t = (C - 3*A)/B + 3

Step-by-step explanation:

Given in the question that,

the speed with which canoe travelled for first 3 hours = A

the speed with which he travelled for any and all time thereafter = B

As we do not know the values of A, B, or C, so the answer will be an expression for C in terms of A and B.

<h3>Formula to use</h3>

distance = speed x time

C = A*3 + B*(t-3)

Rearranging and solving for t

C - (A*3) = B*(t-3)

C - (A*3) = Bt - B3

C - (A*3) + B3 = Bt

t = C - (A*3) + B3 / B

or

t = (C - 3*A)/B + 3

4 0
2 years ago
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