Question

Which expression is equivalent to the given expression?

13(x – 21)

A.
13x – 21

B.
13x – 34

C.
13x – 13 • 21

D.
13 – 21x

Answer 1

hints:

a*(b+c) = a*b + a*c

a*(b-c) = a*b - a*c

Answer 2

c?

Answer 3

good, you multiply that outer 13 by everything inside the parenthesis and subtract

Answer 4

Which expression is equivalent to the given expression?

17x – 32x

A.
17(x – 32)

B.
17x(1 – 32)

C.
x(32 – 17)

D.
x(17 – 32)

Answer 5

a?

Answer 6

no, if you distributed in choice A, you'd get 17*x - 17*32

Answer 7

but you want 17x - 32x

Answer 8

d!

Answer 9

you nailed it

Answer 10

Identify the like terms.

7c, –7d, 7cd, –12cd

A.
7c, 7cd

B.
7cd, –12cd

C.
7c, –7d

D.
7c, –7d, 7cd

Answer 11

b?

Answer 12

yep, basically the same variable terms (both have cd)

the others have a mix of letters but not the same mix

Answer 13

so b?

Answer 14

no d?

Answer 15

@jim_thompson5910

Answer 16

yeah you got it correct with b

Answer 17

Combine like terms.

4s – 15s


A.
11s

B.
–11s

C.
–19s

D.
19s

Answer 18

d?

Answer 19

think of it like 4-15

then tack on 's' when you're done subtracting

Answer 20

11 s?

Answer 21

or would it be negitive?

Answer 22

negative

it's like you have 4 dollars and you buy a 15 dollar item, you'll have -11 dollars...ie be 11 dollars in debt

Answer 23

Evaluate.

2 – 4 • 3 + 6 • 3

A.
–28

B.
0

C.
8

D.
12

Answer 24

-28?

Answer 25

no

Answer 26

you'll use PEMDAS here

Answer 27

8

Answer 28

better

Answer 29

Evaluate the expression, using the given value of the variable.

3 – 7x + 2x when x = 3

A.
–12

B.
–18

C.
–30

D.
–24 <----

Answer 30

d?

Answer 31

@jim_thompson5910

Answer 32

did you replace every x with 3, then evaluate?

Answer 33

3 – 7x + 2x = 3 – 7*(3) + 2*(3) = ???

Answer 34

18?

Answer 35

3 – 7*(3) + 2*(3) = 3 - 21 + 6 = ??

Answer 36

refresh the page if you get weird looking symbols showing up

Answer 37

its 24

Answer 38

no it's not

Answer 39

hopefully you aren't just guessing

Answer 40

im not i swear

Answer 41

think of 3-21 as 21-3

just make the result negative

Answer 42

so a similar example


2-10 = -8

notice how 10-2 = 8 and I just made the result negative

Answer 43

-18 ?

Answer 44

yeah 3 - 21 is -18

Answer 45

3 - 21 + 6 = -18 + 6 = ??

Answer 46

keep in mind that 18 is negative

Answer 47

okay thanks

Answer 48

so what is -18+6 equal to?

Answer 49

the answer isn't -18 btw

Answer 50

i guessed i dont care its 11 here my freinds in the hospital bad crash and i really dont care to do it sorry thanks tho bye