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
irina1246 [14]
3 years ago
13

3x - 9(x-2) = 18x + 30

Mathematics
2 answers:
dem82 [27]3 years ago
8 0

Answer: x= −1/2

Step-by-step explanation:

Let's solve your equation step-by-step.

3x−9(x−2)=18x+30

Step 1: Simplify both sides of the equation.

3x−9(x−2)=18x+30

3x+(−9)(x)+(−9)(−2)=18x+30(Distribute)

3x+−9x+18=18x+30

(3x+−9x)+(18)=18x+30(Combine Like Terms)

−6x+18=18x+30

−6x+18=18x+30

Step 2: Subtract 18x from both sides.

−6x+18−18x=18x+30−18x

−24x+18=30

Step 3: Subtract 18 from both sides.

−24x+18−18=30−18

−24x=12

Step 4: Divide both sides by -24.

−24x

−24

=

12

−24

x=

−1

2

mr Goodwill [35]3 years ago
6 0
Exact form
X= -1/2
Decimal form
X=-0.5
Pls mark me brainliest
You might be interested in
Line A is perpendicular to line B. The slope of line A is -1/9 what is the slope of line b?
Pani-rosa [81]
\bf \stackrel{\textit{perpendicular lines have \underline{negative reciprocal} slopes}}
{\stackrel{slope}{-\cfrac{1}{9}}\qquad \qquad \qquad \stackrel{reciprocal}{-\cfrac{9}{1}}\qquad \stackrel{negative~reciprocal}{+\cfrac{9}{1}}\implies 9}
4 0
3 years ago
Read 2 more answers
Is (2, -4) a solution to the inequality 2x - 3y < 15? Yes or No
miss Akunina [59]

Answer:

No.

Step-by-step explanation:

We substitute the values x = 2 and y = -4 into the inequality.

Left side = 2(2) - 3(-4) = 4 + 12

= 16

Now the right side is 15 so we get 16 < 15 which is incorrect.

So (2, -4) is not a solution.

7 0
2 years ago
Quadrilateral ABCD ​ is inscribed in this circle.
Lelechka [254]

Answer:

m∠C = 122°

Step-by-step explanation:

Opposite angles of a quadrilateral inscribed in a circle are supplementary. This means

m∠A + m∠C = 180°

m∠B + m∠D = 180°

To find angle C we need to find x, then subtract m∠A from 180°

x+20=3x

20=2x

x=10

Now we substitute 10 in for x

m∠A=2(10)+38

m∠A=20+38

m∠A=58°

Now we subtract this value from 180.

m∠C=180-58

m∠C=122°

4 0
2 years ago
Please help on the area for 7 8 9 please all i need help is
weeeeeb [17]

The area of the equilateral, isosceles and right angled triangle are 12.6mm², 9.61in² and 16.81yds² respectively.

<h3>What is the area of the equilateral, isosceles and right angle triangle?</h3>

Note that:

The area of an Equilateral triangle is expressed as A = ((√3)/4)a²

Where a is the dimension of the side.

The area of an Isosceles triangle is expressed as A = (ah)/2

Where a is the dimension of the base and h is the height.

The area of a Right angled triangle is expressed as A = (ab)/2

Where a and b is the dimension of the two sides other than the hypotenuse.

For the Equilateral triangle.

Given that;

  • a = 5.4mm
  • Area A = ?

A = ((√3)/4)(5.4mm)²

A = ((√3)/4)( 29.16mm² )

A = 12.6mm²

Area of the Equilateral triangle is 12.6mm²

For the Isosceles triangle.

Given that;

  • Base a = 3.4in
  • Slant height b = 5.9in
  • height h = ?
  • Area A = ?

The height h is the imaginary line drawn upward from the center of a.

First, we calculate the height using Pythagorean theorem

x² = y² + z²

Where x = b = 5.9in, y = a/2 = 3.4in/2 = 1.7in, and z = h

(5.9in)² = (1.7in)² + h²

34.81in² = 2.89in² + h²

h² = 34.81in² - 2.89in²

h² = 31.92in²

h = √31.92in²

h = 5.65in

Now, the area will be;

A = (ah)/2

A = (3.4in × 5.65in )/2

A = 19.21in²/2

A = 9.61in²

Area of the Isosceles triangle is 9.61in².

For the Right angled triangle

Given that;

  • a = 8.2yds
  • b = 4.1yds
  • c = 9.17yds
  • Area A = ?

A = (ab)/2

A = ( 8.2yds × 4.1yds)/2

A = ( 33.62yds²)/2

A = 16.81yds²

Area of the Right angled triangle is 16.81yds²

Therefore, the area of the equilateral, isosceles and right angled triangle are 12.6mm², 9.61in² and 16.81yds² respectively.

Learn more about Pythagorean theorem here: brainly.com/question/343682

#SPJ1

6 0
2 years ago
I need help with this
Alex73 [517]
I believe the answer to this is the third box
6 0
2 years ago
Other questions:
  • A manager states that his process is really working well. Out of 1,500 parts, 1,477 were produced free of a particular defect an
    13·2 answers
  • PLEASE HELP URGENT DONT WASTE ANSWERS ILL MARK YOU THE BRAINLIEST
    10·1 answer
  • Sally wants to build a three-sided fence enclosing a rectangular play area in her backyard. the area will be exactly 500 square
    7·1 answer
  • Phyllis invested 51000 dollars, a portion earning a simple interest rate of 4 percent per year and the rest earning a rate of 7
    14·1 answer
  • Which ordered pair would form a proportional relationship with the point graphed below
    7·2 answers
  • Please help i am in class and need help pleaseeeeee​
    14·1 answer
  • Which of the given lengths form a right triangle?
    11·1 answer
  • A recreation center is offering special prices on its pool passes and gym memberships for the summer. On the first day of the of
    9·1 answer
  • Determine whether the system has no one, or infinitely many solutions.
    5·1 answer
  • Laura went to a golf shop that has a golf simulator. The simulator estimates the distance that each ball she hits would have gon
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!