SOLUTION: The cost for using 20 HCF of water is $33.08, and the cost for using 57 HCF is $83.03. What is teh cost for using 31 HCF of water?
---What is the formula used to find the answer?
Algebra ->
Rational-functions
-> SOLUTION: The cost for using 20 HCF of water is $33.08, and the cost for using 57 HCF is $83.03. What is teh cost for using 31 HCF of water?
---What is the formula used to find the answer?
Log On
Question 721729: The cost for using 20 HCF of water is $33.08, and the cost for using 57 HCF is $83.03. What is teh cost for using 31 HCF of water?
---What is the formula used to find the answer? Answer by solver91311(24713) (Show Source):
You actually don't provide enough information to answer this question. You need to specifiy that the relationship is linear. However, since you only give two data points, it is reasonable to assume linearity.
You are given two points: (20,33.08) and (57,83.03). Use the two-point form of an equation of a straight line to derive an equation of the desired relationship:
where and are the coordinates of the given points.
Do the arithmetic and simplify. Then substitute 31 for and calculate the value of that results.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
