Draw a pair of supplementary angles that do not share a common side

The table above shows approximate conversions from gallons to liters. what is the value of x?

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

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.