Question

HELP please /:

8. Simplify the following expression.
x − 6y + 2z − 5x − 3y + 8z
A) –4x + 9y + 10z
B) –4x − 9y + 10z
C)–4x + 9y − 10z
D)4x –9y + 10z

9. Simplify the following expression.
2x − 8y + 3x^2 + 7y − 12x
A)3x^2 − 14x − y
B)3x^2 − 10x − y
C)3x^2 − 10x − 15y
D)3x^2 + 10x − y

10. Evaluate the following expression using the values given.
Find 4x − 2y if x = −1 and y = −3.
A)–10
B)2
C)10
D)–2

Answer 1

x - 5x = ???

Answer 2

what do you get when you combine x and -5x

Answer 3

x-5x?

Answer 4

1 - 5 = ???

Answer 5

-4

Answer 6

so x - 5x or 1x - 5x = -4x

Answer 7

do the same with the other like terms

Answer 8

That doesn't make since to me... is there a easier way to do it?

Answer 9

So WAIT. #8. could be B?

Answer 10

you basically add/subtract the numbers in front of the variable

Answer 11

# 8 is choice B

Answer 12

congrats

Answer 13

you'll be doing the same thing for #9

Answer 14

ok

Answer 15

When I am done can you check it for me?

Answer 16

sure thing

Answer 17

#9 is C

Answer 18

# 9 is not C

Answer 19

notice how -8y + 7y = -y

Answer 20

DONT TELL ME THE ANSWER!

Answer 21

i won't

Answer 22

there is no -8?

Answer 23

-8y?

Answer 24

there's a − 8y

Answer 25

yes

Answer 26

yes there is. but not a -8y? it's a subtraction not a negative.

Answer 27

minus 8y = negative 8y

Answer 28

they're the same thing

Answer 29

You acted like it was a negative number.. lol. I don't know :) I am dumb. anyways.

Answer 30

nah, no you're not

Answer 31

sry I should have been more clear

Answer 32

so A is out the question because it can't go down to 14 and then with a variable of y? because I still have 10x.

Answer 33

So my choices are B & D? Right.

Answer 34

correct

Answer 35

I am going to say B.

Answer 36

B is correct

Answer 37

YAY :) I get it!!!!

Answer 38

that's great

Answer 39

#10 is also B

Answer 40

also correct

Answer 41

by sheer coincidence, they're all B...

Answer 42

Yay <3 lol ahahaha.

Answer 43

congrats lol

Answer 44

12. x · x = ?


^ this would equal 2x right?

Answer 45

x times x = x^2, by definition

Answer 46

x+x = 2x by definition

Answer 47

so that was right?

Answer 48

sry i got distracted for a second

Answer 49

what was right? x*x = 2x ?

no, x+x = 2x

x times x = x^2

Answer 50

Use the distributive property to simplify the expression below:
−3(2u − 1)

–5u − 3
–6u + 3
–5u + 3
–6u − 3

Pemdas?

first way I tried it.
2u-1= 1 * -3 =-3?

second way I tried it?
-3*2-1=-7?

Answer 51

and 12 is x^2?

Answer 52

yes, #12 is x^2

Answer 53

-3 times 2u = ??

Answer 54

-6?

Answer 55

-6u

Answer 56

since there's a 'u' with the 2

Answer 57

so -3 times 2u = -6u

Answer 58

so it's -6u and what? and did you know this whole test is nothing but answer B's? I just realized that :D I thought earlier when you said it was all b's it was the past 3 questions but no it's the whole thing. haaha

Answer 59

very very odd

Answer 60

-3 times -1 = ??

Answer 61

and I am on ? number 15.. hahaha! it's weird.

Answer 62

and 3

Answer 63

but what's the sign ?

Answer 64

it's positive since the two negatives cancel

Answer 65

−3(2u − 1)

-3(2u) -3(-1)

-6u + 3

Answer 66

hahahah. that one's b too xD

Answer 67

that's B..yootiful...lol

but very very odd (and concerning)

Answer 68

but I have verified everything so far, so it's all correct

Answer 69

this can't be reality! lol

Answer 70

yeah it's probably a very weird glitch or lazy professors who wrote this assignment

Answer 71

lmfao. I am sorry. I find this amusing.

Answer 72

lol me too, wish it didn't do this though

Answer 73

why? : )

Answer 74

it;s not like I ain't working out every problem.

Answer 75

well it just seems odd and it makes me second guess myself

Answer 76

my dad checked over our work and he is a engineer. he giggled and said that they were all right :) you don't understand how much I appreciate your attendance.

Answer 77

thanks for the extra verification, I appreciate it

Answer 78

let's just hope there's a few C's or D's in there lol