Math Practice 101
Homework Explained - Math Practice 101

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Grade 7 McGraw Hill Glencoe - Answer Keys
Chapter 5: Expressions; Lesson 1: Algebraic Expressions


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Evaluate each expression if x = 3.2, y = 6.1, and z = 0.2.

  • Question 16 (request help)

    Reason Abstractly Write an algebraic expression with the variable x that has a value of 3 when evaluated.
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  • Question 17 (request help)

    Model with Mathematics Write a real-world problem that can be represented by the expression 5x + 10.
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  • Question 18 (request help)

    To find the total number of diagonals for any given polygon, you can use the expression\(\large\frac{n(n-3)}{2}\) , where n is the number of sides of the polygon.

    a. Determine the minimum value than  n could be.
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  • Question 18 (request help)

    b. Make a table of four possible values of n.Then complete the tabel  by evaluating the expression for each value of n.
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  • Question 18 (request help)

    c. Check by drawing the diagonals of a pentagon and counting the diagonals.
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  • Question 19 (request help)

    Which expression below can be used to find the number of inches in any number of feet f ?
    • \(f+12\)
    • \(12f\)
    • \(\large\frac{12}{f}\)
    • \(12f-3\)

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