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
alisha [4.7K]
3 years ago
15

3x-18=39 solve equations with variables

Mathematics
1 answer:
Fofino [41]3 years ago
5 0
Solve for x:
3 x - 18 = 39

Add 18 to both sides:
3 x + (18 - 18) = 18 + 39

18 - 18 = 0:
3 x = 39 + 18

39 + 18 = 57:
3 x = 57

Divide both sides of 3 x = 57 by 3:
(3 x)/3 = 57/3

3/3 = 1:
x = 57/3
The gcd of 57 and 3 is 3, so 57/3 = (3×19)/(3×1) = 3/3×19 = 19:
Answer:  x = 19
You might be interested in
Find the area of the image below
DochEvi [55]

Look at the picture.

The area of a parallelogram:

A_P=5\cdot3=15

The area of a triangle:

A_T=\dfrac{1}{2}\cdot5\cdot5=12.5

The area of the polygon:

[texA=A_P+A_T\\\\A=15+12.5=27.5\ u^2[/tex]

Answer: D. 27.5 square inches /inches?/ I think, correct is units

7 0
3 years ago
The area of a rectangular piece of paper is 32 square inches. The perimeter is 24 inches.
rodikova [14]

Answer

4 and 8

Explanation

List all factors of 32 and then find which number equals 24 when added

Or

You could waste time and use alegbra lol

5 0
3 years ago
2.
9966 [12]

Answer:

(b) -m, m + 3

Step-by-step explanation:

x² − 3x − m(m + 3) = 0

x² − 3x = m(m + 3)

x² − 3x + 9/4 = m(m + 3) + 9/4

(x − 3/2)² = m(m + 3) + 9/4

(x − 3/2)² = m² + 3m + 9/4

(x − 3/2)² = (m + 3/2)²

x − 3/2 = ±(m + 3/2)

x − 3/2 = m + 3/2, -m − 3/2

x = m + 3, -m

6 0
3 years ago
If sin theta = cos theta then find the value of theta
Ksenya-84 [330]

Step-by-step explanation:

\because \sin  \theta =  \cos  \theta  \\   \\ \therefore \: \sin  \theta =  \sin(90 \degree -   \theta)  \\   \\ \therefore \:  \theta =  90 \degree -   \theta \\   \\ \therefore \:   \theta + \theta=  90 \degree \\  \\ \therefore \:  2\theta =  90 \degree \\  \\\therefore \:  \theta =   \frac{90 \degree }{2} \\  \\ \huge \orange{\boxed{\therefore \:   \theta =   45 \degree}}\\  \\

4 0
4 years ago
1. Tanner collected 360 cans and bottles while fundraising for his baseball team. This was 40% of what Reggie collected. How man
Inessa05 [86]
1. 360*0.40=144
so they said 40% reggie collected main mor than 40% collected so you need to do add like 360+144=504
the answer 504

2. you need to do new to old
the new is 15 old is 799
799-15=784x100
the high number is 799
so you need to do 799 divided by 100=7.99
now 784 divided by 7.99=98.12
the answer is 98.12

3 0
3 years ago
Other questions:
  • What is the quotient (x3 – 3x2 + 3x – 2) ÷ (x2 – x + 1)?
    13·2 answers
  • Question 2 (1 point)
    7·1 answer
  • 3y <= -2x+18
    6·1 answer
  • Please help!!<br> Answer correct for brainliest and also get a thanks ! :)
    14·1 answer
  • What is 2.9225 rounded to the nearest cent?
    12·2 answers
  • The temperature of water in the Solar steam power system for time 0 equal to or less than t equal to or less than 10, is modeled
    6·2 answers
  • Jennifer spent $100 at the mall, during tax free weekend.
    15·1 answer
  • How do you do this and what is the answer
    13·2 answers
  • If alex is visiting her moms house and eats a pizza that has 6 triangular pieces, how long would it take for alex’s mom to reach
    12·1 answer
  • What is the slope of y = -4?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!