David's pumpkin cost $8.22
His sister's pumpkin cost $4.98
They paid $13.20
Answer:

Step-by-step explanation:
Assuming that the patio is a rectangle, we have

Where
is the length and
is the width.
Now let's assume that the length of the patio is double than the width.

So, the equation that represents this problem is

Y = mx + b
in this case m = 2 and b = 1 so
equation
y =2x + 1
hope this helps
Answer:
$1.25
Step-by-step explanation:
divide 10/8
equals $1.25
1.25x8=$ 10
Answer:
677
Step-by-step explanation:
238 + 439 = 677
It is t possible to round it form the ones (dollar) place.