4. Which situation could be represented by the equation 10.75 = 5.5 n? Ricardo ran 5.5 miles.

He ran each mile in 10.75 minutes.

What is n, the total number of minutes it took Ricardo to run 5.5

miles?

Ricardo ran a totalof 10.75 miles on Monday.

He ran 5.5 miles in the morning and the rest of the miles in the

evening.

What is n, the number of miles Ricardo ran in the evening?

Ricardo ran a total of 10.75 miles.

He ran 5.5 miles each hour.

What is n, the number of hours Ricardo ran?

Ricardo ran 10.75 hours one week and 5.5 hours the next week.

What is n, the total number of hours Ricardo ran during these

weeks?

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5

5/20 so 25%

step-by-step explanation: