If the measure of abc = 180o, and the length of ad and dc are equal, which is the measure of acd?

if the angle abc will be equal to 180 degrees then we know that abc is a straight line. 

if ad and cd are equal,you can now make  an isosceles triangle. 

the angles of that triangle be contingent upon the length of ad and cd but dac and dca are identical.

so in equation, it will look like: acd = ac + cd = 180 + 90 =   290°

eveidence i thing that

step-by-step explanation:

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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rauschg

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step-by-step explanation: