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# Tutor profile: Tonya I.

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Tonya I.
Math Teacher 16 years-Math Tutor 35 years
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## Questions

### Subject:Geometry

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Question:

What is the total sum of the interior angles of a hexagon?

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Tonya I.

The formula for the total sum of interior angles of a polygon is Sum= 180(n-2), where n is the number of sides the polygon has. In this case a hexagon has 6 sides. So by substitution, Sum= 180(6-2) Sum= 180(4) Sum = 720 So the sum of the interior angles of a hexagon is 720 degrees.

### Subject:Pre-Algebra

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Question:

Solve : 5x = 30

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Tonya I.

In order to solve this equation, you must “undo” the operation performed in order to reveal what x is on the left side. In this equation the 5 is multiplying with the x. We want to reverse that, so we need to divide by 5. But an equation is a relationship that shows equality- so the maintain the “equalness” what ever we do to the left side we must also do on the right side of the equation. 5x=30 5x/5 = 30/5 By simplifying we get x=6

### Subject:Algebra

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Question:

Simplify the following expression: 5x - 6xy + 11y - 3x - 9xy

Inactive
Tonya I.

In algebra, adding and subtracting is “snobby”, meaning that like terms ONLY add with other like terms. For example, an “x” would never think of adding with a “y”! It’s almost like sorting laundry into piles, only the piles have the same variable attached. So in this example 5x will only combine with -3x, and -6xy will only combine with -9xy. The 11y has no other like term with a y in it so it remains the same. So by rearranging: So (5x -3x) + (-6xy-9xy) + 11xy The result is : 2x - 15xy + 11xy

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