The phone company Ringular has a monthly plan where a customer pays a flat monthly fee, and then a set rate per minute. If a customer uses 450 minutes, the monthly cost will be $217. If the customer uses 680 minutes, the monthly cost will be $309. Find the equation of the plan in the form y = mx + b, where x is the number of monthly minutes used and y is the total monthly cost of the Ringular plan. %3D y = If a customer uses 774 minutes, the total cost will be dollars.
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
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