Ask question

Ask question

All categories

3 years ago

10

The sum of a number and 2 times the number is 21. Find the number.

2 answers:

sveta [45]3 years ago

6 0

To find the number you would start by writing out the equation using x as the number. The equation would be x+2x=21. The first step to solve this equation would be to combine like terms, making the equation 3x=21. Finally, you would divide both sides by three, making your answer x=7.

shutvik [7]3 years ago

5 0

2x + x = 21. Combine your like terms and you get3x = 21. Divide both by sides 3 and you get x = 21.

You might be interested in

What is the quotient of -8x^6/4x^-3 ?<br><br> A. x^9/32<br> B. 4x^9<br> C. -12/x^2<br> D. -2x^9

natka813 [3]

I believe the answer to the question is D.

5 0

3 years ago

Read 2 more answers

The equation y=models the savings.

larisa86 [58]

Answer:

Step-by-step explanation:

450

5 0

2 years ago

Katlyn bought a new dress for 34.65 if it was on sale for 23% off what was the original price

pentagon [3]

Divide 34.65 by 100 take your answer times that by 23 that should be your answer

5 0

3 years ago

Read 2 more answers

Jada is visiting New York City to see the Empire State building. She is 100 feet away when she spots it. To see the top, she has

Ilia_Sergeevich [38]

(sin(86.10) * 100 ) / (sin(3.90)) = 1466.85 ft.

(3.90 is the angle of the top to Jada. (180 - (86.1+90))

7 0

3 years ago

The diameter of a circle is 3.2 meters. Which is the circumference of the circle rounded to the nearest hundredth of a meter?

Paraphin [41]

Answer:

10.05 meters

Step-by-step explanation:

If the diameter is 3.2 meters, then the radius is 1.6 meters.

Use the circumference formula, C = 2 $\pi$ r, and solve for C

C = 2 $\pi$ r

C = 2 $\pi$ (1.6)

C = 3.2 $\pi$

C = 10.05

So, to the nearest hundredth of a meter, the circumference is 10.05 meters

4 0

2 years ago