Re: Please check my answers - 8
Yep, that was a big typo, sorry. Actually what I had written on my paper was:
14x^3 - 31x^2 + 15x
Would that answer be correct?
Re: Please check my answers - 8
Can you tell me what I did wrong in 3a?
I took f(x) minus g(x) and wrote it like this:
7x^2 - 5x + 0
0x^2 + 2x - 3
7x^2 - 7x - 3
and thank you for that link.
Re: Please check my answers - 6
x = -b/(2a)
x = -(-8)/2(-2)
x = 8/-4 = -2
I think I forgot to substitute -2 for x to find out y, thanks for pointing that out! (I was thinking of x intercepts) After solving for y, I got (-2,11) Thank you
Basically I don't know anyone in real life that can help me with this, so I need help checking to see if my answers are correct :)
Part B
2) Given the functions f(X) = 7x^2 - 5x and g(x) = 2x - 3 determine and simplify the following:
a) (f-g)(x)
My Answer: 7x^2 - 7x - 3
b) (f - g)(2)
My...
Basically I don't know anyone in real life that can help me with this, so I need help checking to see if my answers are correct :)
PART A
1) Using a graphing utility solve the following system of linear equations. Round your answer to the nearest hundredth.
y = -4x+2
x - 2y = 10
My answer: x...
Basically I don't know anyone in real life that can help me with this, so I need help checking to see if my answers are correct :)
PART A
3) Solve 2x^2 + 4x = 15 by using the quadratic formula.
x = -1 +/- 2sqr34
4) Determine whether the given pairs of lines are parallel, perpendicular, or...
Basically I don't know anyone in real life that can help me with this, so I need help checking to see if my answers are correct :)
PART A
5) Express .00024 in Sci Notation
My answer: 2.4 x 10^-4
6) Factor the following completely: 3x^3 - 18x^2 + 24x
My Answer: (3x)(x - 4)(x - 2)
Basically I don't know anyone in real life that can help me with this, so I need help checking to see if my answers are correct :)
PART A
7) Simplify (5x^3yz^2)^2(-3x^3y^4z)
My answer: -75x^9y^6z^5
8) Simplify the problem below using positive exponents only.
8a^-2b^3c^4
18a^5b^-3c
My...
Basically I don't know anyone in real life that can help me with this, so I need help checking to see if my answers are correct :)
PART A
9) Solve for all X: |2x-5| + 3 = 18
My Answer: x = 10, x = -5
10) Subtract and simplify: (5x^2 - 3x + 8) - (-4x^2 - x + 10)
My Answer: 9x^2 - 2x - 2
Basically I don't know anyone in real life that can help me with this, so I need help checking to see if my answers are correct :)
PART A
11) Find the vertex of f(x) = -2x^2 - 8x + 3 algebraically.
My Answer: (-2,0)
12) Multiply and simplify: (6 - 5i) (4 + 3i)
My Answer: 39 - 2i
Basically I don't know anyone in real life that can help me with this, so I need help checking to see if my answers are correct :)
Part B
1) A golfer hits a nice iron shot and the ball's height above the ground is given by h(t) = -16t^2 + 80t, where t is the time in seconds since the ball was...