Joe will have eaten 24/30
Jane will have eaten 5/30
24 / 5 = 4.8
Joe has eaten 4.8 times as much pizza as Jane.
Answer:Week 1: $35.40
Week 2: $40.90
Week 3: $46.40
Week 4: $51.90
Step-by-step explanation:
29.90 + 5.50(x) = y
replace x with 1, 2, 3, or 4 for each week.
3x+2y=6 -
8x+2y=2
_________
-5x=4
x=-4/5
-2.4+2y=6
y=8.4
The answer is 1561 yuans and 27 jiao.
For this case we have the following equation:

Let 
We have:

By definition, given an equation of the form 
The quadratic formula, to find the solution can be written as:

In this case we have:

Substituting in the quadratic formula we have:
See attached image
Answer:
Option B