If cos x = sin(20+x)° and 0°< x < 90° , the value of x is

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

An object in geometry with no width, length or height is a(n):

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?