A straight angle has four angles. angle 1=39º, angle 2=54º, angle 3=48º, what is the measure of angle 4 ? ANYONE HELP

To complete your spring schedule, you must add calculus and physics. at 9: 30, there are three calculus sections and two physics sections; while at 11: 30, there are two calculus sections and three physics sections. how many ways can you complete your schedule if your only open periods are 9: 30 and 11: 30?

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

Empty box + box + empty box fill in the box is equal to 30 how