Answer:
y=15x+80
Step-by-step explanation:
where x is the monthly membership increase and y is the total amount of memberships
Width = x
length = x+10
Area of deck = 144 square feet
Area = length * width
144 = x(x+10)
Solving for x in a quadratic:
x²+10x = 144
x²+10x-144 = 0
Factor:
(x+18)(x-8) = 0
Solving for x:
x = 8, x = -18
Dimensions cannot be negative, therefore x = 8, only.
Length = x + 10
Length = 18
Width = 8
Answer:
5
Step-by-step explanation:
reminder of rules for division
• If signs are the same then positive result
• If signs are different the negative result
+ 7 ( signs of division are different )
= - 2 + 7
= 5
See the attached picture for the solution: