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3 years ago

PLS HELP ME. Use the opposite operation to undo the

Mathematics

2 answers:

AfilCa [17]3 years ago

4 0

Hey!!!!

Here's your answer:

1. 2m=24

or,m=24/2

m=12

2. y-9=30

or,y=30+9

y=39

3. 3x=12

or,X=12/3

x=4

4. k+12.5=30

or,k=30-12.5

k=17.5

5. 3r=15.3

or,r=15.3/3

r=5.1

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

Good luck on your assignment

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...

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2 years ago

Simplify 5(a - b. 6(a 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.

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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

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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

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Answer:

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Step-by-step explanation:

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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

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

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4 0

2 years ago