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Alexis G.

High School/Middle School math teacher

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Geometry

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Question:

4. Find the measure of the missing angle in the triangle below. Side 1: 95 Side 2: 35

Alexis G.

Answer:

All of the angles together of a triangle come out to be 180. With 2 sides already given we would subtract 95 and 35 from 180 to get the other side. 180 - 95 - 35 = 50 Therefore the other side of the triangle that is missing is 50.

Fire Science

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Question:

What is an example of each class of fire. A, B, C, D, K?

Alexis G.

Answer:

A: Wood, paper B: Flammable liquids C: Electrical D: Flammable metals K: Grease fire

Algebra

TutorMe

Question:

Solve the equation 5(- 3x - 2) + x - 3 = -4(4x + 5) + 13

Alexis G.

Answer:

The first thing you want to do is get rid of the ( ) in the equation. The easiest method to do that is FOIL. That is multiple 5 by -3x ( 5 X -3x ) as well as 5 by -2 (5 X -2). That comes out to be -15x - 10. -15x - 10 Set that aside. Next do the same thing to the opposite side of equation. That is -4 by 4x (-4 X 4x and -4 by 5 (-4 X 5) which comes out to be -16x - 20 Set the equations equal to each other with now out the ( ). -15x - 10 + x - 3 = -16x - 20 + 13 Add the like terms. Like terms are numbers with an x and numbers without an x. -15x + x = -14x a X by its self is considered 1x -10 - 3 = -13 -14x - 13 = -16x - 20 + 13 Do the same for the other side. -20 + 13 = -7 -16x - 7 The new equation is: -14x - 13 = -16x - 7 Now get the x to onside and the numbers without an x to the other side. To get the numbers to the other side you have to do the opposite of what it is. Like -16x to get it to the other side you have to add it to cancel it out. -14x - 13 = -16x - 7 +16x +13 +16x + 13 That leaves: 2x = 6 To get rid of a number next to an x you have to divide it to the other side. So it would be 6/2 which equals 3. Therefore x = 3

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