For breakfast, randy had two egg mcmuffins and a hash brown, to taling 750 calories . jack only had on e egg mcmuffin and a hash brown, totaling 450 calori es. how many calories are in each item?

Let us assign variables.
Let x = egg mcmuffins
Let y = hash brown

Randy had:
2x + y = 750

Jack had
x + y = 450

Using systems of linear equation, we can get the value for x and y by elimination. Subtract the equations.
2x + y = 750
x + y = 450

x = 300

Get y
x + y = 450
300 + y = 450
y = 150.

So there are 300 calories for McMuffins and 150 calories for hash brown.

For a 0.25 pfor b o.3pp (0.25+0.3)=0.28