One angle of an equilateral triangle measures (4x - 20) degrees. what is the value of x?

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.