I'm stuck....can someone please explain how to solve these problems?
1) f(x) = x2 - 1
g(x) = x - 1
Find (g o f) (x)
a. x^2-2
b. x^2-2x
c.x^2-2x-1
d.x^2-2x-2
2) Which of the following is the solution to the inequality -2(x-3) < -x+3?
a. x> 3
b. x< 3
c. x>1
d. x>-3
3) Write the equation of the line that passes through the points (2,5) and (6,2).
a. y=-3/4x+15/2
b. y=3/4x+7/2
c. y=-3/4x+23/4
d. y=-3/4x+13/2
4) Solve the literal equation Ax - By = C for x
a. x=C/Ay+B
b. x=C+By/A
c. x=C-(A-B)/y
d. x=C/A-By
5) What is the vertex of the parabola y = -3(x - 4)^2 - 5?
a.(4,-5)
b.(-3,-5)
c.(-3,4)
d.(3,-4)
6) Is 9x2 + 12xy + 9y2 a perfect square trinomial?
a. yes
b. no
7) In solving this system by the substitution method, what is the expression for x that you will substitute into the second equation? {x-4y=13
{2x+3y=-7
a. x = 13 - 4y
b. x=-7+3/2x
c. x = 4y + 13
d. none of the above
8) If a quadratic equation has 2 unique rational roots, how many times will its graph intersect the x-axis?
a. Zero times
b. One time
c. Two times
d. Three times
9) When x2 - 7x - 8 is factored completely, one of the factors is
a. (x-1)
b. (x-2)
c. (x-8)
d. (x+2)
10) The graph of the system {3x+2y=5 consists of two lines that:
{6x+4y=10
a. Intersect at one point
b. Intersect in an infinite number of points
c. Are not in the same plane
d. Do not intersect
Thank-you!!!
1) f(x) = x2 - 1
g(x) = x - 1
Find (g o f) (x)
a. x^2-2
b. x^2-2x
c.x^2-2x-1
d.x^2-2x-2
2) Which of the following is the solution to the inequality -2(x-3) < -x+3?
a. x> 3
b. x< 3
c. x>1
d. x>-3
3) Write the equation of the line that passes through the points (2,5) and (6,2).
a. y=-3/4x+15/2
b. y=3/4x+7/2
c. y=-3/4x+23/4
d. y=-3/4x+13/2
4) Solve the literal equation Ax - By = C for x
a. x=C/Ay+B
b. x=C+By/A
c. x=C-(A-B)/y
d. x=C/A-By
5) What is the vertex of the parabola y = -3(x - 4)^2 - 5?
a.(4,-5)
b.(-3,-5)
c.(-3,4)
d.(3,-4)
6) Is 9x2 + 12xy + 9y2 a perfect square trinomial?
a. yes
b. no
7) In solving this system by the substitution method, what is the expression for x that you will substitute into the second equation? {x-4y=13
{2x+3y=-7
a. x = 13 - 4y
b. x=-7+3/2x
c. x = 4y + 13
d. none of the above
8) If a quadratic equation has 2 unique rational roots, how many times will its graph intersect the x-axis?
a. Zero times
b. One time
c. Two times
d. Three times
9) When x2 - 7x - 8 is factored completely, one of the factors is
a. (x-1)
b. (x-2)
c. (x-8)
d. (x+2)
10) The graph of the system {3x+2y=5 consists of two lines that:
{6x+4y=10
a. Intersect at one point
b. Intersect in an infinite number of points
c. Are not in the same plane
d. Do not intersect
Thank-you!!!