Answer:
Rhombus
Step-by-step explanation:
R=16
J=32
20+40(which is 20×2)=60
20-4=16
16×2=32
Answer:
7
Step-by-step explanation:
15-8=7 this is how you answer it
Answer:
and

Step-by-step explanation:
Assume that Mike bought only cookies and hot dogs.
The total can be represented as:
--- (1)
And the amount spent can be represented as:
--- (2)
Required
Determine the system of equation
Let c represents the number of cookies and h, number of hot dogs.
implies 
And
Cost of cookies = 0.75 * c
Cost of hot dogs = 1.10 * h
So, we have:

Hence, the equations are:
and

Solving for c and h
Make c the subject in 

Substitute 5 - h for c in 



Collect Like Terms


Solve for h


-- approximated
Recall that:



You know this is just a formula, right?