Question

help please!!!!!

Answer 1

Given the functions f(x) = -2x - 1 and g(x) = -3x + 4, which operation results in the smallest coefficient on the x term?

Two operations result in the same coefficient
Subtraction
Multiplication
Addition

Answer 2

i think it's A but idk

Answer 3

I think subtraction is correct. If you subtract f(x) by g(x), you will get y = x -5. And 1 is the smallest coefficient on the term of x

Answer 4

oh thank you! i'm terrible at math lol. do you think you can help me out with some other ones?

Answer 5

Of course. I am happy to

Answer 6

alright thanks. i'll just tell you what i think the answer is and then i'll see what you say :)

Answer 7

Simplify (3 + 2i)(7 − 5i).

21 − 10i2
11 − i
21 − i − 10i2
31 − i
in this one i was thinking it's C. am i correct?

Answer 8

I am sorry. What is between 7 and 5i?

Answer 9

ohhh. it's subtraction. that would make it negative right?

Answer 10

okay i misread that lol. i was thinking it's A.

Answer 11

Are you learning about imaginary numbers?

Answer 12

yeah i passed that part. it was kind of confusing tho

Answer 13

It is simple. Just solve it step by step.
So \((3+2i)(7-5i)=21-15i+14i-10i^2=21-10i^2-i\), right?

Answer 14

yep

Answer 15

idk how to solve that lol

Answer 16

Do you notice that \(i^2=-1\)?

Answer 17

yes

Answer 18

Then \(21-10i^2-i=21-10(-1)-i=...\)

Answer 19

so \[-10i ^{2} \] would equal to -10 times -1?

Answer 20

wait you typed that lol. sorry. okay i think the whole equation would equal to -11? or -11i. i have no idea

Answer 21

Ok. \(21-10(-1)-i=31-i\)

Answer 22

you change the subtraction to addition?

Answer 23

Yes. Because \((-10)(-1)=10\), right?

Answer 24

yes.

Answer 25

so the answer would be D

Answer 26

Right. \(31-i\)

Answer 27

yay! thank you haha. i'm taking a quiz right now and most of the questions make no sense to me at all. you still able to help?

Answer 28

Yes. I will do by best to help

Answer 29

alright! :)

Answer 30

Find the solution and determine if it is an extraneous solution.
\[5\sqrt{x+7} = -10\]

Answer 31

you there?

Answer 32

Yeah. Sorry, I have been solving the problem

Answer 33

oh, it's fine! lol

Answer 34

Is it -10 or 10?

Answer 35

I tried to solve this but cannot find a real solution

Answer 36

it's -10

Answer 37

Ok just to make sure. I will try again

Answer 38

okayy :)

Answer 39

Is "No solution" accepted? :)

Answer 40

it doesn't have that as an option :( i'll just guess on this one.

Answer 41

i need help with this other one.

Answer 42

Ok. Hopefully I will be more helpful on this one

Answer 43

simplify.

Answer 44

\((x^a)^b=x^{ab}\)

Answer 45

wait what's ab equaled to?

Answer 46

Numbers. They represents numbers (or variables)

Answer 47

which numbers tho lol

Answer 48

\((x^{\frac{2}{5}})^{\frac{5}{6}}\)=\(x^{\frac{2}{5}\times \frac {5}{6}}\)

Answer 49

so do i just multiply straight across?

Answer 50

Yes. That will be \(x^\frac{1}{3}\), right?

Answer 51

yes. 1/3 would be simplified right?

Answer 52

Right

Answer 53

ohhh ok gotcha.

Answer 54

i have another one.. lol

Answer 55

Sure

Answer 56

Which of the following expressions is the conjugate of a complex number with −6 as the real part and −5i as the imaginary part?

6 + 5i
6 − 5i
−6 − 5i
−6 + 5i

Answer 57

Sorry, I can't see the question very well. Can you write the options

Answer 58

A) 6 + 5i
B) 6 - 5i
C) -6 - 5i
D) -6 + 5i

Answer 59

And in the question, is it 6 or -6? 5i or -5i?

Answer 60

-6 and -5i

Answer 61

Oh then the answer is -6 and 5i

Answer 62

would it be subtraction or addition?

Answer 63

Addition

Answer 64

-6 +5i

Answer 65

thank you!
i have another one lmao

Answer 66

Given the functions j(x) = x2 + 3 and k(x) = x2 - x + 4, which operation results in a 2nd degree polynomial?

Addition
Subtraction
Multiplication
No operations
i was thinking addition but i'm probably wrong..

Answer 67

Addition

Answer 68

yay i'm finally right on one hahah

Answer 69

:)

Answer 70

the next one is a word problem

Answer 71

Bob and Susie wash cars for extra money over the summer. Bob's income is determined by f(x) = 6x + 13, where x is the number of hours. Susie's income is g(x) = 4x + 18. If Bob and Susie were to combine their efforts, their income would be h(x) = f(x) + g(x) and would be split evenly between the two of them. Assume Bob works 3 hours. Create the function h(x), and indicate if Bob will make more money working alone or by teaming with Susie.

h(x) = 2x + 5, work alone
h(x) = 2x + 5, team with Susie
h(x) = 10x + 31, work alone
h(x) = 10x + 31, team with Susie

Answer 72

Sorry. I don't know how to solve this one

Answer 73

it's fine lol. what about a different one?

Answer 74

Sure. I will do my best

Answer 75

Simplify (x - 1)(x2+ 5x + 2).

x3+ 6x2+ 7x - 2
x3+ 4x2- 3x - 2
x3− x2+ 2x− 2
x3+ 5x2- 6x - 2

Answer 76

\((x-1)(x^2+5x+2)=x^3+5x^2+2x-x^2-5x-2=x^3+4x^2-3x-2\)

Answer 77

i wish i was as good as you in math lol

Answer 78

Just practice a little everyday

Answer 79

Thanks :)

Answer 80

haha you're welcome. i need help with another one

Answer 81

Sure

Answer 82

Which of the following represents the area of a rectangle
whose length is x + 4 and whose width is x - 9?

x2- 36
x2+ 5x - 36
x2- 5x - 36
x2+ 36x - 5
i'm sorry if i'm asking too much

Answer 83

You are good. Just express \((x+4)(x-9)=x^2-9x+4x-36\)

Answer 84

am i supposed to add -9 with 4 since they are like terms?

Answer 85

Exactly

Answer 86

sooo that would give me -5

Answer 87

so it's C!

Answer 88

Right.

Answer 89

yesss haha. i have just 3 more questions..

Answer 90

Ok

Answer 91

Identify all of the following solutions of

Answer 92

Sorry. I will be back

Answer 93

Some stuff to do

Answer 94

alright. that's fine lol

Answer 95

\(\sqrt{x+14}=x-2\) <=> \(x+14=(x-2)^2\) <=> \(x+14=x^2-4x+4\)
\(x^2-5x-10=0\). Solve for x: \(x=\frac{5+\sqrt{65}}{2}\) or \(x=\frac{5-\sqrt{65}}{2}\) (extraneous)