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Question 544841: What is the slope m and y-intercept point of the line y = 2x + 1?
slope m = 2 and y-intercept at (0, 1)
slope m = 1 and y-intercept at (2, 0)
slope m = 1 and y-intercept at (0, 2)
slope m = 2 and y-intercept at (1, 0)
WOULD SOMEONE PLEASE HELP ME OUT WITH ANY OF THESE QUESTIONS...thanks!!!
5. Given the function f(x) = x + 3x + 4 , find the value of f(–1)
6. For f(x) = , find f(-1)
7. A function is a relation in which two different ordered pairs have the same first coordinate. TRUE OR FALSE?
9. Find the ordered pair solution to the following system of equations (Use any method):
5x + 2y = 0
x - 3y = 0
10. Find the ordered pair solution to the following system of equations (Use any method):
3x – y = 5
2x + 5y = -8
11. Twice one number minus a second number is five. Twice the second number plus the first number is eight. Find the numbers.
12. Find the choice below which gives a first step in solving the given system of equations by the addition method.
2x - 3y = 7
x - 4y = 2
4.
13. If the system of equations given below is solved using the substitution method, what is the equation that results from solving the second equation for y, and substituting into the first equation?
3x - 2y = 7
x - y = 5
14. A system of parallel lines is called a(n) _______________ system.
15. How many solutions does the following system of equations have?
y = -3x + 8
y = -3x + 9
Answer by oberobic(2304)   (Show Source):
You can put this solution on YOUR website! You are asking too much at one time. Ask one question per question and you have the chance that several tutors will answer a question each. With a lengthy block of questions, many tutors will not begin to answer the questions because it is too much of a time commitment. I'll try a few, but no guarantee that I'll finish the list.
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4. What is the slope m and y-intercept point of the line y = 2x + 1?
slope m = 2 and y-intercept at (0, 1)
slope m = 1 and y-intercept at (2, 0)
slope m = 1 and y-intercept at (0, 2)
slope m = 2 and y-intercept at (1, 0)
.
The equation is in slope intercept form: y = mx + b
m = slope = 2
y-intercept = (0,b) = (0,1)
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5. Given the function f(x) = x + 3x + 4 , find the value of f(–1)
.
f(x) = x+3x + 4 = 4x + 4
f(-1) = 4(-1) + 4 = -4+4 = 0
.
6. For f(x) = , find f(-1)
.
Appears to be the same as 5.
.
7. A function is a relation in which two different ordered pairs have the same first coordinate. TRUE OR FALSE?
.
A function means that for each element of the domain (x values) there is only one y value.
If you have the points (1,1) and (1,2), then the slope between these points is undefined because
x-x1 = 1-1 = 0
In graphic terms, the line is vertical between those two points.
If you have a relation where two points have the same x value, you do not have a function.
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9. Find the ordered pair solution to the following system of equations (Use any method):
5x + 2y = 0
x - 3y = 0
.
5x + 2y = 0
5x -15y = 0 (2nd equation after multiplying by 5)
------------- subtract
0x +17y = 0
y = 0
.
Substitute to find y.
You'll see y = 0
.
(0,0)
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10. Find the ordered pair solution to the following system of equations (Use any method):
3x – y = 5
2x + 5y = -8
.
15x -5y = 25 (1st equation multiplied by 5)
2x + 5y = -8
------------ add
17x +0y = 17
x = 1
.
substitute to find y
.
3(1) -y = 5
-y = 2
y = -2
.
(1,-2)
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11. Twice one number minus a second number is five. Twice the second number plus the first number is eight. Find the numbers.
.
2x - y = 5
x + 2y = 8
.
multiply the first equation by 2 and then add them
.
4x -2y = 10
x +2y = 8
-------------
5x +0y = 18
x = 18/5
.
substitute to find y
.
12. Find the choice below which gives a first step in solving the given system of equations by the addition method.
.
2x - 3y = 7
x - 4y = 2
.
No choices listed.
.
13. If the system of equations given below is solved using the substitution method, what is the equation that results from solving the second equation for y, and substituting into the first equation?
.
3x - 2y = 7
x - y = 5
so
x = y+5
.
3(y+5) -2y = 7
3y +15 -2y = 7
y = -8
.
14. A system of parallel lines is called a(n) _______________ system.
.
15. How many solutions does the following system of equations have?
.
y = -3x + 8
y = -3x + 9
.
Zero: the lines are parallel.
.
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