Algebra 11-4  Solving systems by Addition.

 

In 1-6 solve the system.

 

1.                                               2.        

 

 

 

 

 

 

 

 

3.                                            4.        

 

 

 

 

 

 

 

 

 

 

5.         The sum of two numbers is 18 and their

            difference is 4.  What are the numbers? _______________

 

 

 

6.         At Cecil’s Dive, you get 3 pieces of french-toast and a glass of milk

            for $2.80.  Four pieces of french-toast and milk cost $3.40.  How

            much should it cost for 1 piece of french-toast and milk?

 

            _____________

 

 

7.         Two hotdogs and 14 french fries is 360 calories.  Two hotdogs and

            6 french fries is 280 calories. 

            How many calories is each hotdog? __________

 

            How many calories is each french fry? _________