What do you do to check whether a number is rational or irrational

What is the focal length of the parabola whose graph is shown? focus: (-3, 2.6) and directrix: (-0.6)

Problem: Find the sum of the constants a, b, c and such that 2x^2-8x+7=a (x-h) ^2+k for all real numbers

Evaluate. Be smart, (2.31∙5.82+4.18∙2.31+90∙2.31) : 2.31∙0.55

Does y=2x+3 have a solution

What is the value of x to the nearest tenth tan 64 degrees = x/7

Which expressions are equivalent to 5 x minus 15? Select three options. 5 (x + 15) 5 (x minus 3) 4 x + 3 y minus 15 minus 3 y + x Negative 7 y minus 6 x minus 8 y + x Negative 20 minus 3 x + 5 + 8

Which statement is true about f (x) = square root x

Two times the smallest of three consecutives even integers is four more than three times the largest. Find the integers.

If f (x) = 8x and g (x) = 2X+1 find (fog) (x)

Write an expression that represents the product of Q and 8:4