Austin earns 9.75 an hour at a part time job and earns $12 each time mowing lawns in the neighborhood. They graph the amount of hours worked at the part time job (X) and the number of lawns mowed (Y) to determine how to earn more than $300. What type of boundary line should be used in the graph

Explanation:

The key word to focus on is "more than" which is the same as "greater than". Neither of which involves "or equal to", so we do not include points on the boundary. A dashed line can be thought of as an electric fence that you can get closer and closer to, but can't touch it.

If Austin wanted to involve a solid boundary line, then the "more than" needs to be changed into something like "at least". In other words, if he wanted to earn at least $300, then we'll include points on the boundary and have a solid boundary. As you can probably guess, "he earns at least $300" means "he earns $300 or more".

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.