Alfie has a bag with 2 grey balls & 3 white balls, he picks a ball at random keeps it then picks another, find the probability he picks at least 1 grey ball! TY

Askateboard ramp is in the shape of a right triangle what is the height of the ramp

If the perimeter of the square equals the perimeter of the regular pentagon. each side of a pentagon is 16cm long. how long is each side of the square?

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.