1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
KengaRu [80]
3 years ago
15

Twice the sum of three and a number is 30. Find the number

Mathematics
1 answer:
DedPeter [7]3 years ago
5 0

9514 1404 393

Answer:

  • 2(x +3) = 30
  • 12

Step-by-step explanation:

When x represents the number, "the sum of 3 and a number" is (x+3). Twice that sum is 2(x+3). "Is 30" means this expression is equal to 30:

  2(x +3) = 30 . . . . an equation for the given conditions

__

We can solve this equation by dividing by 2:

  x + 3 = 15

  x = 12 . . . . . . subtract 3

The number is 12.

You might be interested in
A boy is standing next to a radio. As he moves away from the radio, which would MOST LIKELY occur?
Alexxandr [17]
The last one im pretty sure
5 0
3 years ago
Read 2 more answers
Help please me!!!!!!!!!!!
AlexFokin [52]
D:  We solve this in exactly the same way in which we solved the previous area problem.  Side length is s, area is s^2.  Here, side length is 5 in; area is 25 in^2.
the problem does say, however, not to include units in your answer.  Thus, just write "25."
5 0
2 years ago
Read 2 more answers
Arithmetic and Geometric Sequences (Context)
V125BC [204]

The formula for compound interest

A = P( 1 + r/n) ^ (nt)

A is the amount in the account at the end

P is the principal balance or the amount initially invested

r is the annual interest rate in decimal form

n is the number of times it is coupounded per year

t is the number of years

A = 1800 ( 1+ .0375/1) ^ (1*6)

A = 1800 ( 1.0375)^6

A = 2244.92138

Rounding to the nearest cent

A = 2244.92

7 0
1 year ago
Estimate the square root to the nearest integer. -51
marissa [1.9K]

Answer:

49

Step-by-step explanation:

6 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B%20%5Csqrt%5B3%5D%7B8%7D%20%7D%7B27%7D%20" id="TexFormula1" title=" \frac{ \sqrt[
Verizon [17]

Answer:

0.0740R

Step-by-step explanation:

The Number is repeating.

4 0
2 years ago
Other questions:
  • Help me asap :3...........
    13·1 answer
  • Select all that are measures of angles coterminal with a 145° angle.
    13·2 answers
  • Solve (6-5x)/10-(2x+1)/5+x/3=2x/15
    5·1 answer
  • Can someone answer this question please WBA’s wee it correctly if it’s correct I will mark you brainliest
    11·1 answer
  • A model airplane is 8 inches long. If the actual airplane is 32 feet, find the scale of the model.
    14·1 answer
  • Using base ten blocks to divide with double digits
    7·1 answer
  • You intend to estimate a population mean with a confidence interval. You believe the population to have a normal distribution. Y
    7·1 answer
  • Answer all please, thank you :)
    14·2 answers
  • = 3x + 4, what is y when x is 1, 2, and 3
    8·1 answer
  • A restaurant customer left ​$1.80 as a tip. The tax was 8% and the tip was ​20% of the cost including tax.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!