Which of these is an open sentence?

1. 10-2=8
2. 12+2=15
3. n-3=7
4. 3-3=0

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x

Astraight water slide is 175 feet above ground and is 200 feet long. what is the angle of depression to the bottom of the slide?