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
NEED HELP FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
storchak [24]

Answer:

A.) y = 0.4x^(2) + 3.4x + 4

Step-by-step explanation:

x = -5

y = -3

5 0
2 years ago
Read 2 more answers
The price of a stock went from $100 to $99.80. What was the percentage of decrease?
Brums [2.3K]
.20 is the correct answer because 100-99.80
3 0
3 years ago
Use properties to find the sum or product 89+27+11
yulyashka [42]
The answer to 89+27+11 is 127
3 0
3 years ago
Read 2 more answers
Help please, thank you.
aivan3 [116]

Answer:

B

Step-by-step explanation:

It's not a function because the X's repeat

8 0
2 years ago
Answer for -2x-41=5x-6
seraphim [82]

Answer:

x=-5

Step-by-step explanation:

-2x-41=5x-6

-35=7x

-5=x

7 0
3 years ago
Read 2 more answers
Other questions:
  • A Ferris wheel with a diameter of 50 feet has 30 equally spaced passenger cars. What is the length of the arc between the center
    12·1 answer
  • eric can spend a maximum of $270 on office supplies. Each rem of paper costs $6. Each ink catridge costs $18. Which of the follo
    12·1 answer
  • I NEED HELP RIGHT AWAY
    8·2 answers
  • Solve the equation for x. <br><br> 2(5x + 3) = 26
    6·1 answer
  • Help me ASAP this answer is a lil tough
    12·2 answers
  • There is a bag filled with 5 blue, 2 red and 3 green marbles.
    9·1 answer
  • If j // l, m&lt;1 = 135, m&lt;2 = 55, and m&lt;3 = 45, list all other parallel lines. Justify your answers. Show work if any.
    5·1 answer
  • An operator at the top of a lighthouse sights a sailboat. The point from which the sighting is made is 25 m above sea level. The
    9·1 answer
  • Write an equation in point-slope form of
    11·1 answer
  • HELPPP im running out of time hjhjhdkw
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!