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
REY [17]
2 years ago
7

[CORRECT ANSWER RECEIVES BRAINLIEST ONLY

Mathematics
2 answers:
Alex Ar [27]2 years ago
8 0

 The three lines are concurrent if they share a single point. From the second equation, x = 8y + 19 Substitute this value of x into the other equations.  This will allow you to solve for y. 2(8y + 19) + 3y = 0                              9(8y + 19) + 5y = 17 16y + 38 + 3y = 0                                 72y + 171 + 5y = 17 19y = -38                                                77y = -154    y = -2                                                      y = -2 Notice that the two equations have the same y value as the solution.  Now we just evaluate the second equation to solve for x.  So we know that at some x value, the y-coordinate is -2. x = 8(-2) + 19x = -16 + 19x = 3 The single point that these three equations share is (3, -2).  2a) 4x - 3y = 13                     eq1-6x + 2y = -7                   eq2  Use the elimination method.  Multiply eq1 by 2 and multiply eq2 by 3. 8x - 6y = 26                eq1-18 + 6y = -21              eq2  Add the equations to eliminate the y terms. -10x = 5     x = -1/2  Substitute this value of x into any of the equations to solve for y.  2b) Substitute the first equation into the second equation.  This will get the second equation in terms of x.  Solve for x from that newly written equation.  Once you solved for x, substitute that value of x into the first equation to solve for y.  We did this method for the first question.  2c) You have a vertical line that passes all points that have the x coordinate 7.You have a horizontal line that passes all point that have the y coordinate -5. If you were to graph these two lines, they will intersect at (7, -5).  Or you can just read the x and y values as (x, y).  3a) Draw the following lines on a coordinate system: i) A vertical line that passes through the points (3, 0).ii) A horizontal line that passes through the point (0, 6).iii) A line that passes through the points (0,0) and (1, -3). Once you have drawn these lines throughout the coordinate system, look for 3 points of intersection.  Those points are the vertices of the triangle.  Be sure to use the line segments that make up that triangle.  3b) By now, you should see that you get a right triangle.  Find the area of the two triangles using the formula Area = (base × height) / 2 The length of the horizontal side is the base.  The length of the vertical side is the height.  4) Lines that have the same slope never intersect.  Put both equations in  y=mx+b  form where the slope is the coefficient of x. 2x + 3y = 23  ----->  3y = -2x + 23   ------>   y = (-2 / 3)x + 23/3 7x + py = 8   ----->   py = -7x + 8     ------>   y = (-7 / p)x + 8/p  Set the slopes equal to each other. -2 / 3 = -7 / p  Cross-multiply. -2p = -21  Solve for p from this equation.   I leave this all to you.
sammy [17]2 years ago
3 0

Answer:

step 2

Step-by-step explanation:

The student first made an error in the step 2.

Because if we simplify the equation A in step 1, we should distribute the right side of the equation following the rule a(b-c) = a*b +a*(-c)

So, it would be

–7y = (-7)*(16)+(-7)*(-2z)

=> -7y = -112 + 14z

You might be interested in
Alan rode his bike for 5 1/5 hours during one week. That same week, Brook rode her bike for 6 1/8 hours. How many more hours did
melomori [17]

Answer:

1-8 =7 duh

Step-by-step explanation:

6 0
2 years ago
What is a linear equation for the cost of a cell phone that is $549.99 that has a 30 month installment plan?
erica [24]
Y = mx + b

y = 30x + $549.99
7 0
3 years ago
Please help me due at 12:50. Please please please, I love you . Don’t ignore this please.
bearhunter [10]

Answer:

9/10

Step-by-step explanation:

4/10 + 2/10 + 3/10 = 9/10

4 + 2 + 3 = 9

8 0
3 years ago
The measurement of a central angle is 75. Find the measurement of <br> in radians
Marina CMI [18]
Circumference = 360 degrees 
<span>Circumference = 2π radians (comes from 2*pi*radius) </span>

<span>Therefore </span>
<span>360 deg. = 2*π radians </span>
<span>180 deg. = π radians </span>
<span>1 deg. = (π/180) radians </span>

<span>75 deg. = 75(π/180) radians </span>
<span>75 deg. = 75π / 180 radians </span>
<span>don't bother to try and simplify π (it is an irrational number) </span>
<span>however you can simplify 75/180 </span>
<span>both are divisible by 5 </span>
<span>75π/180 = 15π/36 </span>
<span>both are divisible by 3 </span>
<span>75 deg. = 5π/12 radians </span>

<span>We normally don't bother to go further, unless you actually need it as a decimal fraction (in which case, you will have an approximation) </span>

<span>75 deg. ≈ 1.308997 radians</span>
5 0
3 years ago
How do I know when to add or subtract when solving translations problem
andreyandreev [35.5K]

Answer: Look for key words.

Step-by-step explanation:

Example: 15 added and 24.

Added is the key word

24 + 15

7 0
3 years ago
Read 2 more answers
Other questions:
  • Can u help me plz plz plz plz
    9·1 answer
  • In the diagram below, jkjk is an equilateral triangle and Km jl
    11·1 answer
  • Suppose a submarine is diving from the surface of the water at a rate of 80 feet per minute. Which integer represents the depth
    12·1 answer
  • There is a clown's face on the top of a spinner. The tip of his hat rotates to (−2, 5) during one spin. What is the cosine value
    13·1 answer
  • Which of the following linear function represent the given points? (0,2) and (1,3) *
    15·1 answer
  • What is GCF and LCM of -21 and 80? ASAP! Please Help! Will give Brainliest! Explanation Please! Love you forever!
    11·1 answer
  • What is the solution (ordered pair) for the graph ?
    13·1 answer
  • HELP!!
    12·1 answer
  • The value of 25x³ y² z for x=1, y=2 and z=3 is
    15·2 answers
  • I also need someone to help me with this also
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!