Math Problem Statement

Evaluate the expression for y=3.2. Write your answer in simplest form. – y+6 /y(– y+3)

Solution

We are given the expression:

y+6y(y+3)\frac{-y + 6}{y(-y + 3)}

and need to evaluate it for y=3.2y = 3.2. Here's the step-by-step process:

Step 1: Substitute y=3.2y = 3.2 into the expression

3.2+63.2(3.2+3)\frac{-3.2 + 6}{3.2(-3.2 + 3)}

Step 2: Simplify the numerator

3.2+6=2.8-3.2 + 6 = 2.8

Step 3: Simplify the denominator

3.2(3.2+3)=3.2(0.2)=0.643.2(-3.2 + 3) = 3.2(-0.2) = -0.64

Step 4: Divide the numerator by the denominator

2.80.64=4.375\frac{2.8}{-0.64} = -4.375

Final Answer:

4.375\boxed{-4.375}

Do you want a detailed breakdown or further questions about this process?


Relative Questions:

  1. What are the key properties of fractions when simplifying complex expressions?
  2. How does substituting a value into an equation help solve real-world problems?
  3. What happens if the denominator in a fraction equals zero, and how do we handle that?
  4. Can this expression be evaluated for any value of yy? Why or why not?
  5. How does the sign of the fraction change when both numerator and denominator are negative?

Tip:

Always check the domain of the expression to ensure the denominator does not become zero for specific values of yy.

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Math Problem Analysis

Mathematical Concepts

Algebra
Substitution
Rational Expressions
Fractions

Formulas

Substitution of a variable
Simplification of rational expressions
Division of fractions

Theorems

Properties of fractions
Non-zero denominator requirement

Suitable Grade Level

Grades 8-10