ZP and ZQ are supplementary angles. If mZP is 21 degrees less than twice the measure of ZQ, find the measure of each angle.​

What is the correlation coefficient for the data? don't forget to turn the diagnoisticon (in the catalog menu of the calculator). r = answer (round to the nearest thousandth)

The system of equations graphed below has how many solutions?

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?