Which of the following is a Pythagorean triple?​

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Choose the correct translation for the following statement. it is at most ten. x< 10 x< 10 x> 10 x> 10

Consider the input and output values for f(x) = 2x - 3 and g(x) = 2x + 7. what is a reasonable explanation for different rules with different input values producing the same sequence?