Answer:
Function, in mathematics, an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable). Functions are ubiquitous in mathematics and are essential for formulating physical relationships in the sciences.As we have seen in examples above, we can represent a function using a graph. Graphs display many input-output pairs in a small space. ... The most common graphs name the input value x and the output value y , and we say y is a function of x , or y=f(x) y = f ( x ) when the function is named f .
Step-by-step explanation:
Brainlist will be very accept if you want took me a while to do :)
R - 18 = 50
r = 50 + 18 = 68
Hence Rick is 68 yrs old
After combining like terms and simplifying 
we get 
Step-by-step explanation:
We need to combine like terms to simplify the expression:
Like terms: The terms are like when they have same variable and same exponent.
Solving:
So, After combining like terms and simplifying we get
Keywords: Solving Expressions
Learn more about Solving Expressions at:
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The tree is already 24 feet tall and growing at a rate of 2 feet per year. The tree can grow for 17 more years (17*2=34, 34+24=58) before they have to trim it.
