Jasmine is thinking about buying a car and is comparing two vehicles. One gets 13 miles to the gallon (mpg) and the other agents 26 miles to the gallon. Assuming that she drives 5,000 miles a year, how much money would she save by buying the more fuel efficient car if gas is $3 a gallon?

$576.93

Step-by-step explanation:

Car A

13 miles to the gallon (mpg)

13 miles = 1 gallon

Car B

26 miles to the gallon

26 miles = 1 gallon

Car B is more fuel efficient than car A

1 gallon = $3

Assuming that she drives 5,000 miles a year

Cost of buying Car A

5000 miles / 13 miles × $3

= 384.62 × 3

= $1,153.86

Cost of buying car B

5000 miles / 26 miles × $3

= 192.31 × 3

= $576.93

Car A - car B

= $1,153.86 - $576.93

= $576.93

Jasmine will save $576.93 by buying the more fuel efficient car if gas is $3 per gallon

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:

step-by-step explanation:

divide, then simplify your answer.

1. make -15.66 ÷   5.8 a fraction. then divide.

2. simplify.  

3. final answer.