You have a piggy bank containing a total of 80 coins in dimes and quarters. If the piggy bank contains 12.95, how many dimes are there in the piggy bank?

How do you solve a question like this?

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.