A/b = (a+b)/a

What is the value of a/b? Please show all steps.

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

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.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?