MercenaryForHire
Lifer
You lazy little brat. Pull this post right now and do your own damn homework, or I'm calling your parents.
- M4H
- M4H
-
We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.
closed
Page 3 - Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech.
Gunslinger08
Lifer
1. a) 3(x-2) <= 4-x
3x - 6 <= 4-x
4x <= 10
x <= 10/4
x <= 5/2
b) -4 <= 2x + 4 <= 8
-8 <= 2x <= 4
-4 <= x <= 1
c) 2x^2 > 6x + 20
2x^2 - 6x - 20 > 0
2(x^2 - 3x - 10) > 0
2(x + 2)(x - 5) > 0
x > 5
2. a) i^3 = -i
b) sqrt(-50)
5*sqrt(-2)
5*sqrt(2)*i
c) sqrt(-54)
3*sqrt(-6)
3*sqrt(6)*i
d) (3*sqrt(6))*(2*sqrt(5))
6*sqrt(30)
e) sqrt(3)*(sqrt(48) - sqrt(12))
sqrt(144)-sqrt(36)
12-6
6
f) sqrt(8) - sqrt(2)
2*sqrt(2) - sqrt(2)
sqrt(2)
g) 3*sqrt(45)-4*sqrt(5)
9*sqrt(5)-4*sqrt(5)
5*sqrt(5)
h) (2*sqrt(3) + sqrt(2))*(2*sqrt(3) - sqrt(2))
(12 - 2)
10
i) ?
j) 3i(2-i)
6i - 3i^2
6i - 3(-1)
6i + 3
k) 4(7 + i) - 9(5 - 7i)
28 + 4i - 45 + 63i
67i - 17
l) (5 + 3i)(4 - 8i)
20 - 40i + 12i - 24i^2
20 - 28i + 24
44 - 28i
m) ?
n) 2i(3 - 5i)^2
2i(9 - 30i + 25i^2)
18i - 60i^2 + 50i^3
18i + 60 - 50
18i + 10
7. a) y = 4x^2 - 24x
x = -b/2a = 24/8 = 3
y = 4*9 - 24*3
y = 36 - 72
y = -36
vertex : (3, -36)
minimum at this vertex
b) y = -(1/3)x^2 + 8x + 2
x = -b/2a = -8/-(2/3) = 12
y = -(1/3)*144 + 8*12 + 2
y = -48 + 96 + 2
y = 50
vertex : (12, 50)
maximum at this vertex
8. a) 4x^2 - 16x = 0
4x(x - 4) = 0
x = 0, 4
b) 3y^2 + 7y + 4 = 0
(3y + 4)(y + 1) = 0
y = -4/3, -1
c) 6x^2 - 5x = 4
6x^2 - 5x - 4 = 0
(3x - 4)(2x + 1) = 0
x = 4/3, -1/2
3x - 6 <= 4-x
4x <= 10
x <= 10/4
x <= 5/2
b) -4 <= 2x + 4 <= 8
-8 <= 2x <= 4
-4 <= x <= 1
c) 2x^2 > 6x + 20
2x^2 - 6x - 20 > 0
2(x^2 - 3x - 10) > 0
2(x + 2)(x - 5) > 0
x > 5
2. a) i^3 = -i
b) sqrt(-50)
5*sqrt(-2)
5*sqrt(2)*i
c) sqrt(-54)
3*sqrt(-6)
3*sqrt(6)*i
d) (3*sqrt(6))*(2*sqrt(5))
6*sqrt(30)
e) sqrt(3)*(sqrt(48) - sqrt(12))
sqrt(144)-sqrt(36)
12-6
6
f) sqrt(8) - sqrt(2)
2*sqrt(2) - sqrt(2)
sqrt(2)
g) 3*sqrt(45)-4*sqrt(5)
9*sqrt(5)-4*sqrt(5)
5*sqrt(5)
h) (2*sqrt(3) + sqrt(2))*(2*sqrt(3) - sqrt(2))
(12 - 2)
10
i) ?
j) 3i(2-i)
6i - 3i^2
6i - 3(-1)
6i + 3
k) 4(7 + i) - 9(5 - 7i)
28 + 4i - 45 + 63i
67i - 17
l) (5 + 3i)(4 - 8i)
20 - 40i + 12i - 24i^2
20 - 28i + 24
44 - 28i
m) ?
n) 2i(3 - 5i)^2
2i(9 - 30i + 25i^2)
18i - 60i^2 + 50i^3
18i + 60 - 50
18i + 10
7. a) y = 4x^2 - 24x
x = -b/2a = 24/8 = 3
y = 4*9 - 24*3
y = 36 - 72
y = -36
vertex : (3, -36)
minimum at this vertex
b) y = -(1/3)x^2 + 8x + 2
x = -b/2a = -8/-(2/3) = 12
y = -(1/3)*144 + 8*12 + 2
y = -48 + 96 + 2
y = 50
vertex : (12, 50)
maximum at this vertex
8. a) 4x^2 - 16x = 0
4x(x - 4) = 0
x = 0, 4
b) 3y^2 + 7y + 4 = 0
(3y + 4)(y + 1) = 0
y = -4/3, -1
c) 6x^2 - 5x = 4
6x^2 - 5x - 4 = 0
(3x - 4)(2x + 1) = 0
x = 4/3, -1/2
robothouse77
Golden Member
for 'M' you have to do the complex conjugate of the denominator..................
MercenaryForHire
Lifer
😀
"You got an F+, Jeffrey. The + is because you spelled your name right."
- M4H
Suspicious-Teach8788
Lifer
goodness... is this like algebra 2? i feel old for once. i'll stop asking my diff. eq questions.
MercenaryForHire
Lifer
OP is fuxored worse if I hit Ctrl-V right now. :evil:
- M4H
MercenaryForHire
Lifer
Ron Munro
GB #620
Route 3rd
Alexandria, ON K0C 1A0
(613) 525-5479
All easily obtainable and provided public information, folks. Nothing illegal here.
- M4H
PrinceofWands
Lifer
Wow, things have changed since I was in school then. My 9th grade math was introdcution to variables and other basic algebra components. Wouldn't have touched those topics until 11th or 12th grade minimum. In fact, that looks like a page straight out of my last college algebra course.
That being said, it isn't hard stuff and the OP should just learn to do it himself.
PrinceofWands
Lifer
Just for humor I cracked open my hs freshman algebra book. The first two chapters review basic math concepts, like fractions, ratios, percents, decimals etc. After that is an introduction to variables, solving equations, factoring etc. That's really about all there is to the book, and it's what 90% of the students used. Soph year was geometry. That was all that was required, though there were a couple elective math courses to take as a junior and senior for those that wanted (algebra II and precalc I think). Of course, this was 20 years ago now (jesus h christ on a crutch I'm getting old fast).
Seriously though, it's standard college Math 112 stuff today (college algebra).
MercenaryForHire
Lifer
Who's Yo' Daddy? 😀
1-800-RU-LEGIT
- M4H
Suspicious-Teach8788
Lifer
Depends how fast you went I hit algebra in 7th grade, so this was 9th grade (algebra II) cuz 8th grade was geometry. By the next year I was onto pre-calculus which was honestly a repeat of freshman yr algebra2, and calculus in junior yr.... I tried to do multivariable in senior yr at a JC but honestly I had no motivation having gotten into all my schools. I could've easily finished differential equations before college, but here I am as a sophomore in college taking that course.... I took it slow later on.
MercenaryForHire
Lifer
It's 12th grade homework, folks. 😛
- M4H
- M4H
TRENDING THREADS
-
Discussion Zen 5 Speculation (EPYC Turin and Strix Point/Granite Ridge - Ryzen 9000)- Started by DisEnchantment
- Replies: 25K
-
Discussion Intel Meteor, Arrow, Lunar & Panther Lakes + WCL Discussion Threads
- Started by Tigerick
- Replies: 25K
-
Discussion Intel current and future Lakes & Rapids thread- Started by TheF34RChannel
- Replies: 24K
-
-
