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
In-s [12.5K]
3 years ago
7

What is the value of x in the equation 2x + 9 = 21? (4 points)

Mathematics
1 answer:
Triss [41]3 years ago
8 0

answer=2x=12,x=6

2z+4=0,z=-2

You might be interested in
Someone help me with this question please.
frosja888 [35]

Answer:

Andre scored 14 points.

Equation: x = 14

Step-by-step explanation:

Let the number of points Andre scored be x.

Diego's points = x-9

Noah's points = (x-9) × 2

                       = 2x-18

Now, you know the exact value of Noah's points which is 10.

2x-18 = 10

Isolate the 2x.

2x = 10+18

    = 28

x = 28÷2

  = 14

4 0
3 years ago
Read 2 more answers
Back to my question. I have this problem that I cant solve.
vesna_86 [32]

Answer:

Step-by-step explanation:

-21-9k=-8(6k+3)

-21-9k= 48k+24

+9k          +9k

-21=57k+24

-24         -24

-45=57k

divide 57 by -45

k= -1.2

idk if that helps, sorry

6 0
2 years ago
Read 2 more answers
The coefficient of the ab term is
Jlenok [28]

Answer:

A coefficient is an integer that is written along with a variable or it is multiplied by the variable. For example, in the term 2x, 2 is the co-efficient.

Those variables which do not carry any number along with them, have a coefficient 1. For example, the term y has coefficient 1.

Step-by-step explanation:

5 0
3 years ago
Given -8(x-3)=-32 prove x=7
AleksAgata [21]

Step-by-step explanation:

Plug x in :

-8(7-3) = -32

Distribute :

-56 - (-24) = -32

Subtract :

-32 = -32

7 0
3 years ago
I need help answering this question...
koban [17]
We need to solve how much it cost to paint a room with are 459 ft² given that a room with an area of 306 ft² costs $72. The solution is shown below:
Cost per area = $72 / 306 ft²
Cost per area = $0.2353 / ft²

Solving the cost for the similar room:
Costs = $0.2353 * 459 ft²
Costs = $108

The answer is $108.
4 0
3 years ago
Other questions:
  • What is 3 x 10,000 + 4 x 1,000 + 6 x 100 + 8 x 10 + 8 written in standard form?
    6·1 answer
  • What is the answer to the question 25% of what is 21?
    9·2 answers
  • Batting Averages Your batting average is 0.244, and you have been at bat 82 times. How many hits do you have?
    9·1 answer
  • Simplify this complex fraction
    12·1 answer
  • Find values that make the sentence correct 1). 6/8=x/12=x/16
    12·2 answers
  • 1a) Use the pythagorean theorem tofind the missing side length.
    10·2 answers
  • Polly’s favorite cereal has 270 calories. The nutrition label on the box states that 56 of the calories come from fat. How many
    8·1 answer
  • Find the distance between the points (-5,-7) and (4,-7)? PLS HELP GIVE BRAINLIEST
    8·2 answers
  • Math problem for highschool
    10·2 answers
  • Write a positive or negative integer that represents the situation. You lose 38 coins in a video game.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!