A binary operation (+)is defined on the set R of real numbers by a(+)b=a2+b2 -ab for all a, b,e, r solve the equation 4(+)a=28

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.

What is the fewest number of full weeks briyana would have to work to have enough money? 8 weeks9 weeks 10 weeks11 weeks

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10