there are 11 shirts in your closet. 5 blue 3 green and 3 red. you randomly select one to wear, it is blue or green. find the probability

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

Nine more than four times a number is the same as one less than twice the number. find the number?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1