All categories

3 years ago

Solve: 5(n — 3) = 30

Mathematics

2 answers:

sp2606 [1]3 years ago

8 0

Answer:

n = 9

Step-by-step explanation:

5(n-3) = 30

Expand the brackets. (Multiply n by 5 then multiply -3 by 5.)

5n-15 = 30

Isolate 5n.

5n = 30+15

Evaluate.

5n = 45

Find n.

n = 45 ÷ 5

n = 9

topjm [15]3 years ago

8 0

Answer:

n = 9

Step-by-step explanation:

1) divide both sides by 5 to cancel it out

(n-3=6)

2) add 3 to each side to cancel out the -3

(n=9)

You could factor the 5 to get 5n-15=30 but dividing by 5 just makes the number easier

You might be interested in

You are making a scale drawing of your classroom using the scale 1 inch silicone 3 feet. The floor of your classroom is a rectan

prisoha [69]

The length would be 7 inches and the width would be 6 inches <span>☆ I hope this helps! If you need help showing work or anything I'd be happy to let you know in the comments :0</span>

8 0

3 years ago

What algebraic expression must be added to the sum of

user100 [1]

Answer:

We need to add the expression: $4x^2-16$

Step-by-step explanation:

As the first step, add the first two polynomials listed in order to find what their sum is. Do such by combining like terms:

$3x^2+4x+8\,+ (2x^2-6x+3) =5x^2-2x+11$

now, you need to find another polynomial (let's call it P(x)) such that added to the one we just found above, will render $9x^2-2x-5$ as a result.

Putting this phrase in mathematical terms, we write:

$5x^2-2x+11\,+ P(x) = 9x^2-2x-5$

Now we solve for this unknown P(x) in this equation, by subtracting each of the terms that are accompanying it on the left side of the equation. We do one at a time for clarity:

$5x^2-2x+11\,+ P(x) = 9x^2-2x-5\\-2x+11+P(x)=9x^2-5x^2-2x-5\\-2x+11+P(x)=4x^2-2x-5\\11+P(x)=4x^2-2x+2x-5\\11+P(x)=4x^2-5\\P(x)=4x^2-5-11\\P(x)=4x^2-16$

Therefore, the expression we need to add is: $4x^2-16$

8 0

4 years ago

Which list of ordered pairs represents solutions to x + y= 2 ?

EleoNora [17]

Answer:

(-4, 6), (0, 2), (4, -2). You can find this by adding the x and y to see which ones get 2. -4 + 6 = 2. 0 + 2 = 2. 4 + -2 = 2.

4 0

3 years ago

Who wanna join https://collabify.app/s/team-invite/2Ctaj 1+11

Ratling [72]

Answer:

Step-by-step explanation:

Because no

7 0

3 years ago

Read 2 more answers

One rectangular prism has a base area of 120 square feet, and a height of

Mandarinka [93]

Answer: The volume of the second prism is less.

Step-by-step explanation:120x12 (first rectangular prism)= 1440ft and the second one is 84x6 divided by two for the bases multiplied by 16 would be 4032.

8 0

4 years ago