a dealer makes a loss of 10% by selling an article for #81000 how much should he have sold it to make a profit of 15%

Find the total area for the regular pyramid ( follow the answer set up in the picture)

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.

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15