Question 1: determine whether y varies directly with c. if so, find the constant of variation k and write the equation.
x y
5 25
10 50
15 70
20 90
a. yes; k=12 y=2x
b. yes; k=4 y=4x
c. yes; k=5 y=5x
d. no
(picture will also be provided)
answer asap, and you!

d

step-by-step explanation:

it is b)

hope this : )

step-by-step explanation:

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6