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3 years ago

Variable expression for 3 times the sum of x and 2

Mathematics

1 answer:

Lynna [10]3 years ago

6 0

3(x+2)
Remember in expressions there’s no equals sign
Hope this helps!!

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Suppose the life of a particular brand of calculator battery is approximately normally distributed with a mean of 75 hours and a

Orlov [11]

Answer:

idek

Step-by-step explanation:

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3 years ago

1. Solve the equation. 2. Check your solution. k÷3=21

Sedaia [141]

Answer:

k = 63

Step-by-step explanation:

3 x 21 = 63

8 0

3 years ago

For your friend's birthday, you have 3 presents to wrap. Find the combined surface area of these 3 gifts so you know how much wr

omeli [17]

The answer is: 5,614 square inches.

The explanation is shown below:

1. The gift on the bottom is a rectangular prism. To calculate its surface area, you must apply the following formula:

$SA=2[(l)(w)+(l)(h)+(h)(w)]$

Where $l$ is the length (20 inches), $w$ is the width (42 inches) and $h$ is the heigth (16 inches).

2. Substitute values:

$SA1=2[(20in)(42in)+(20in)(16in)+(16in)(42in)]=3,664in^{2$

3. The surface area of the other gifts can be calculated with the formula for calculate the surface area of a cube:

$SA=6s^{2}$

Where $s$ is the side.

4. The surface area of the bigger cube is:

$SA2=6(15in^{2})=1,350in^{2}$

5. The surface area of the smaller cube is:

$SA3=6(10in^{2})=600in^{2}$

6. The total surface area (the combined surface area of the three gifts) is:

$SAt=SA1+SA2+SA3\\SAt=3,664in^{2}+1,350in^{2}+600in^{2}\\SAt=5,614in^{2}$

7 0

3 years ago

The measure of a square wall is 9 feet 7 inches on each side. Estimate the square feet a painter would have to cover to the near

Nookie1986 [14]

First, convert those inches to feet.
7in =ish 0.5833333
(you find this by dividing 7/12 on a calculator)
Now you just square 9.583333333
9.583333333^2
9.583333333 * 9.583333333
91.84027777ish
Rounded to the nearest foot, means the answer is 92ft.

5 0

3 years ago

PLEASE HELP ME!!! 10 points!

Brut [27]

Answer:

5/4

hope it helps u

3 0

3 years ago

Read 2 more answers