contestada

1.
Two lines, A and B, are represented by the following equations:

Line A: 4x + 4y = 16
Line B: x + y = 4

Which statement is true about the solution to the set of equations? (4 points)



It is (1, 2).
There are infinitely many solutions.
It is (1, 5).
There is no solution.
2.
Consider the following pair of equations:

x + y = –2
y = 2x + 10

If the two equations are graphed, at what point do the lines representing the two equations intersect? (4 points)



(–4, 2)
(4, 2)
(–2, 4)
(2, 4)
3.
Consider the following system of equations:

y = 5x + 6
y = –x – 7

Which description best describes the solution to the system of equations? (4 points)



Line y = 5x + 6 intersects line y = –x – 7.
Lines y = 5x + 6 and y = –x – 7 intersect the x-axis.
Lines y = 5x + 6 and y = –x – 7 intersect the y-axis.
Line y = 5x + 6 intersects the origin.
4.
Consider the following set of equations:

Equation A: y = 2x + 4
Equation B: y = 3x + 1

Which of the following is a step that can be used to find the solution to the set of equations? (4 points)



2x + 4 = 3x + 1
2x = 3x + 4
2x + 4 = 3x
2x + 1 = 3x + 4
5.
Consider the following set of equations:

Equation R: –3y = –3x - 9
Equation S: y = x + 3

Which of the following best describes the solution to the given set of equations? (4 points)


No solution
One solution
Infinite solutions
Two solutions

Respuesta :

1. Multiply the second line by 4: 4x+4y=16. They are the same line so there are infinitely many solutions.

2. Substitute for y.
x+(2x+10)=-2
3x+10=-2
3x=-12
x=-4

Plug x in
-4+y=-2
y=2

Final answer: (-4,2)

3. The answer is the first one because the solution is always where two lines intersect. The crossing of the x axis, y axis, and origin are irrelevant.

4. 2x+4=3x+1. This is because both equations define the value of y and therefore must be equivalent.

5. Infinitely many solutions. If you multiply the second equation by -3, you can tell it's coinciding or the same line.

Answer:

no solution

Step-by-step explanation:What is the solution to the system of equations?

5x – 4y = 6

–5x + 4y = –10

(4, 4)

(–2, –5)

infinitely many solutions

no solution