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
Likurg_2 [28]
3 years ago
13

(-9x^2 - 2x) – (-9x^2 - 3x)

Mathematics
1 answer:
Usimov [2.4K]3 years ago
8 0

I assume you need to simplify, after simplifying your answer would be x.

You might be interested in
Quiz 3-3 Parallel and Perpendicular Lines on the Coordinate Plane (Gina Wilson All Things Algebra 2014-2019) need these for a qu
yKpoI14uk [10]

Answer:

14. y = -2x -1

15. y = -\frac{3}{4}x +3

16. y= 4x + 9

17. y  = -\frac{5}{3}x -2

18. y= -\frac{2}{3}x -5

19. y = 4x -3

20. y = -3x -7

Step-by-step explanation:

Solving (14):

Given

(x_1,y_1) = (-7,13)

Slope (m) = -2

Equation in slope- intercept form is:

y - y_1 = m(x-x_1)

Substitute values for y1, m and x1

y - 13 = -2(x -(-7))

y - 13 = -2(x +7)

y - 13 = -2x -14

Collect Like Terms

y = -2x -14 + 13

y = -2x -1

Solving (15):

Given

(x_1,y_1) = (-4,6)

Slope (m) = -\frac{3}{4}

Equation in slope- intercept form is:

y - y_1 = m(x-x_1)

Substitute values for y1, m and x1

y - 6 = -\frac{3}{4}(x - (-4))

y - 6 = -\frac{3}{4}(x +4)

y - 6 = -\frac{3}{4}x -3

Collect Like Terms

y = -\frac{3}{4}x -3 + 6

y = -\frac{3}{4}x +3

Solving (16):

Given

(x_1,y_1) = (-5,-11)

(x_2,y_2) = (-2,1)

First, we need to calculate the slope\ (m)

m = \frac{y_2 - y_1}{x_2 - x_1}

m = \frac{1 - (-11)}{-2 - (-5)}

m = \frac{1 +11}{-2 +5}

m = \frac{12}{3}

m = 4

Equation in slope- intercept form is:

y - y_1 = m(x-x_1)

Substitute values for y1, m and x1

y - (-11) = 4(x -(-5))

y +11 = 4(x+5)

y +11 = 4x+20

Collect Like Terms

y= 4x + 20 - 11

y= 4x + 9

Solving (17):

Given

(x_1,y_1) = (-6,8)

(x_2,y_2) = (3,-7)

First, we need to calculate the slope\ (m)

m = \frac{y_2 - y_1}{x_2 - x_1}

m = \frac{-7 - 8}{3- (-6)}

m = \frac{-7 - 8}{3+6}

m = \frac{-15}{9}

m = -\frac{5}{3}

Equation in slope- intercept form is:

y - y_1 = m(x-x_1)

Substitute values for y1, m and x1

y - 8 = -\frac{5}{3}(x -(-6))

y - 8 = -\frac{5}{3}(x +6)

y - 8 = -\frac{5}{3}x -10

Collect Like Terms

y  = -\frac{5}{3}x -10 + 8

y  = -\frac{5}{3}x -2

18.

Given

(x_1,y_1) = (-6,-1)

y = -\frac{2}{3}x+1

Since the given point is parallel to the line equation, then the slope of the point is calculated as:

m_1 = m_2

Where m_2 represents the slope

Going by the format of an equation, y = mx + b; by comparison

m = -\frac{2}{3}

and

m_1 = m_2 = -\frac{2}{3}

Equation in slope\ intercept\ form is:

y - y_1 = m(x-x_1)

Substitute values for y1, m and x1

y - (-1) = -\frac{2}{3}(x - (-6))

y +1 = -\frac{2}{3}(x +6)

y +1 = -\frac{2}{3}x -4

y= -\frac{2}{3}x -4 - 1

y= -\frac{2}{3}x -5

19.

Given

(x_1,y_1) = (-2,-11)

y = -\frac{1}{4}x+2

Since the given point is parallel to the line equation, then the slope of the point is calculated as:

m_1 = -\frac{1}{m_2}

Where m_2 represents the slope

Going by the format of an equation, y = mx + b; by comparison

m_2 = -\frac{1}{4}

and

m_1 = -\frac{1}{m_2}

m_1 = -1/\frac{-1}{4}

m_1 = -1*\frac{-4}{1}

m_1 = 4

Equation in slope\ intercept\ form is:

y - y_1 = m(x-x_1)

(x_1,y_1) = (-2,-11)

Substitute values for y1, m and x1

y - (-11) = 4(x - (-2))

y +11 = 4(x +2)

y +11 = 4x +8

Collect Like Terms

y = 4x + 8 - 11

y = 4x -3

20.

Given

(x_1,y_1) = (-10,3)

(x_2,y_2) = (2,7)

First, we need to calculate the slope of the given points

m = \frac{y_2 - y_1}{x_2 - x_1}

m = \frac{7 - 3}{2 - (-10)}

m = \frac{7 - 3}{2 +10}

m = \frac{4}{12}

m = \frac{1}{3}

Next, we determine the slope of the perpendicular bisector using:

m_1 = -\frac{1}{m_2}

m_1 = -1/\frac{1}{3}

m_1 = -3

Next, is to determine the coordinates of the bisector.

To bisect means to divide into equal parts.

So the coordinates of the bisector is the midpoint of the given points;

Midpoint = [\frac{1}{2}(x_1+x_2),\frac{1}{2}(y_1+y_2)]

Midpoint = [\frac{1}{2}(-10+2),\frac{1}{2}(3+7)]

Midpoint = [\frac{1}{2}(-8),\frac{1}{2}(10)]

Midpoint = (-4,5)

So, the coordinates of the midpoint is:

(x_1,y_1) = (-4,5)

Equation in slope- intercept form is:

y - y_1 = m(x-x_1)

Substitute values for y1, m and x1: m_1 = -3 & (x_1,y_1) = (-4,5)

y - 5 = -3(x - (-4))

y - 5 = -3(x +4)

y - 5 = -3x-12

Collect Like Terms

y = -3x - 12 +5

y = -3x -7

4 0
2 years ago
Read 2 more answers
What is the surface area of the cone? (Use 3.14 for π.)
aev [14]

Answer: 117.226666667 cm^3

Step-by-step explanation:

So, we all know the formula for working out the volume of a cone is

V= 1/3πr^2h

V = 1÷3 x 3.14 × r^2 x h

The radius is half the diameter. Your diameter is 8 so the radius would be 4. And 7 is your height by the way.

So let's plot it all in!

V= 1÷3 x 3.14 × 4^2 x 7

V = 117.226666667cm^3

Round to the nearest 10 = 117.2cm^3

To the nearest 100 = 117.23cm^3

To the nearest whole number = 117cm^3

4 0
3 years ago
Read 2 more answers
Which of the following describes the graph of y=3√(27x−54)+5 compared with the parent cube root function? Horizontal translation
Misha Larkins [42]

Answer:

Translated 2 units right

Translated 5 units up

Stretch by a factor of 3

Not reflected

Step-by-step explanation:

From edg

4 0
3 years ago
Find the radius of the cylinder with height 6 cm with volume 54 cubic cm
Lubov Fominskaja [6]
V = pi r^2 h
54 = 3.14 * r^2 * 6
54 = 18.84 r^2
Divide both sides by 18.84
r^2 = 2.866
Square root both sides
r = 1.7
4 0
3 years ago
Read 2 more answers
What is 6.02 x 10^-4
Dafna11 [192]

Answer:

0.000602

Step-by-step explanation:

Sorry if that is wrong

7 0
2 years ago
Read 2 more answers
Other questions:
  • The measure of one side of a square is (s + 3) inches long.Writes two different equivalent expressions that represent the perime
    5·1 answer
  • For a snack. lali ate 2/4 of an apple. makeo ate 3/4 of a peanut butter sandwhich. which girl ate more
    13·1 answer
  • Determine the standard form of the equation of the line that passes through (-7,8) and (0,2)
    8·1 answer
  • 4 x 2/3<br> With a number story
    13·2 answers
  • How was the first pilgrimage presented?
    5·1 answer
  • Can some one please help me
    15·1 answer
  • Kennedy got money for her birthday. She spent half of her money on a blanket, $74 on a jacket, $36 for a pair of shoes, and had
    12·2 answers
  • Question 17 options:
    5·1 answer
  • Ellianna made a scatter plot that showed a positive association and had one outlier. Write a possible scenario for Ellianna's sc
    11·1 answer
  • Name the Solid.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!