Attached the solution and work. I think this is what you asked for.
First do the equations in the parentheses
(21)+(28) the first one isn't negative anymore because a negative times a negative is a positive.
Now we just add them, 21+28=49
Answer:
560 sandwiches were made
Step-by-step explanation:
set up a porportion.
45/252=55/x
45x=13860
x=308 cheese sandwichs
308+252=560
15.2 is the mode....the number that appears the most often
Answer:
x = 40
Step-by-step explanation:
Using Pythagoras' identity in the right triangle
x² + 30² = 50²
x² + 900 = 2500 ( subtract 900 from both sides )
x² = 1600 ( take the square root of both sides )
x =
= 40