Question

can someone check my answers?
simplify the following expression
21(x-4)+2
A.21x=2 my answer
B. 107x
C. 21x-82
D. 27x

solve the following expression 5x-102=13
A. 23 my answer
B. -23
C. -17.8
D. 17.8

solve the following equation 2x-31=3(x+2)
A. 37
B.-37 my answer
C. 5
D. 37/5

find the range of the function f(x)=4x=1 for the domain (-1,0,1,2,3)

A. -5,-3,0,7,11 my answer

find the slope of the graph 9x-3y=15
A: -3
B.3 my answer
C. -1/3
D.1/3

if i got it wrong walk me through it and we will figure it out together:) @Nnesha @jim_thompson5910

Answer 1

i can give the rest of the options for the range function if i got that wrong

Answer 2

the first one is incorrect, you have to distribute the 21 so do 21*-4 and 21*x then last add 2

Answer 3

#2 is C

Answer 4

for first one
you have to distribute parenthesis by 21
2nd) right
3rd) right
4th one i guess there is a typo 4x plus or negative 1 ??

Answer 5

last one is right :)

Answer 6

sorr its -1

Answer 7

no the 2nd one you got right, solve the following expression 5x-102=13
add 102 to both sides. 5x-102+102=13+102
5x= 115
Divide both sides by 5
5x/5=115/5
x=23

Answer 8

okay
domain is all x values so replace x by ( (-1,0,1,2,3) ) to find range
so when you replace x by 0 whats your answer suppose to be ??

Answer 9

ok is number 1 21x-82? thats what i ended up with next

Answer 10

yes right :)

Answer 11

-4?

Answer 12

4 times 0 = ??
and then subtract 1

Answer 13

-3

Answer 14

4 times 0 = ??
its not equal to 4
when you multiply something by 0 you should get 0

Answer 15

RIGHT SORRY i must of been thinking of 4 x 1

Answer 16

yep its okay :)

Answer 17

of so we have 0 now

Answer 18

4 times 0 = 0
but you have to subtract one right
0 - 1 = ?

Answer 19

1

Answer 20

-1

Answer 21

yep u got it :) -1

Answer 22

now replace x by 1 to find range

Answer 23

by the 1 or -1?

Answer 24

you already replaced x by -1
now by just one
they gave you alll x values you have to plug that into x one by one to get range