Ahorse ran 4 miles in 15 minutes, what speed did the horse run?

Sarah used her calculator to find sin 125 degrees. she wrote down sin sin125 degrees.57. how could sarah recognize that her answer is incorrect?

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

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?