Solve Problems With Angle Relationships Practice Test

A triangle has angles measuring $$(2x + 5)°$$, $$(3x - 10)°$$, and $$(x + 30)°$$. After finding the value of $$x$$, what is the measure of the largest angle in the triangle?

Two intersecting lines form four angles. The measure of one angle is $$5x - 20°$$. An adjacent angle to this angle has measure $$3x + 40°$$. A student incorrectly calculates that $$x = 15$$. If the student uses this incorrect value, what would be the difference between their calculated measure of the first angle and the actual measure?