Sam decided that he is going to start biking to work as much as possible. after 4 days of work sam has
logged 15 km on his bike.
a. set up a proportion to solve the amount of km he will log after 10 days on the bike.
b. solve for the amount of km in part (a).

Proportion:

4/15 = 20/75

Sam will bike 37.5 km after 10 days.

Step-by-step explanation:

1. Let's review the information given to answer the question correctly.

Number of days Sam has gone to work biking = 4

Amount of kilometers Sam has logged on his bike = 15

2. a. Set up a proportion to solve the amount of km he will log after 10 days on the bike.

Number of days Sam has gone to work biking = 4

Amount of kilometers Sam has logged on his bike = 15

2. a. Set up a proportion to solve the amount of km he will log after 10 days on the bike.

4/15 = 20/75

b. Solve for the amount of km in part (a).

Let's use the proportion, this way:

20/75 = 10/x

20x = 75 * 10

20x = 750

x = 750/20

x = 37.5

Sam will bike 37.5 km after 10 days.

10% of increase is the final answer! : )

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: