Which step in the problem-solving process includes the following statement? Decide whether your answer makes sense.
A. Plan
B. Look back
C. Solve
D. Understand
Pls help ASAP

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

In the rectangle below ac=30 units what is de

In two or more complete sentences, formulate how to use technology to calculate the appropriate regression model for the given data. you are not required to find the model, just choose the appropriate regression and explain how to use the technology. (-5,,2.,0.8), (0,-0.5), (2,-1.3), (3,-0.8), (5,2)