Question

What is the difference of j and k?

j(x) = x – 14 k(x) = 7 + x

(Points : 5)
(j – k)(x) = –21
(j – k)(x) = –21 + 2x
(j – k)(x) = –7
(j – k)(x) = –7 + 2x

Answer 1

(x - 14) - (7 + x)

Answer 2

combine like terms?

Answer 3

well, first distribute the - into the parentheses. then you can combine like terms

Answer 4

the answer i dot is d

Answer 5

i didn't get d. after distributing the -, you get x - 14 - 7 - x
then after combining like terms, i get -21
so the answer is a

Answer 6

oh

Answer 7

make sense?

Answer 8

a little bit

Answer 9

cool :)

Answer 10

A costume designer will buy between 5 and 12 hats for the actors in a play. Each hat costs $7. The function c(h) = 7h models the total amount of money the costume designer spends on h hats.

What is the practical range of the function?
(Points : 5)
all real numbers from 5 to 12, inclusive
all real numbers from 35 to 84, inclusive
all integers from 5 to 12, inclusive
all multiples of 7 between 35 and 84, inclusive

Answer 11

can you help me with this last one?

Answer 12

so between 5 and 12, can be shown as 5 < h < 12. so to get the cost of the hats, we would do 5(7) < c < 12(7)

Answer 13

C

Answer 14

no c would be the number of hats, not the cost

Answer 15

what's 5 times 7

Answer 16

35

Answer 17

and what's 12 times 7

Answer 18

84

Answer 19

yea, so i'd say b

Answer 20

ok thankyou!

Answer 21

no problemo :)