What is the answer for 2

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.