Write y=x^2+4x-5 in graphing form

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?