Kia has 10 coins in a bag. t here are three $1 coins and seven 50 pence coins. kia takes at random 3 coins from the bag. workout the probability she takes out exactly $2.50

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

What is the expression in factored form? 225x^2 - 144 a. 9(5x+4)^2 b. 9(5x-4)^2 c. 9(4x+5)(4x-5) d. 9(5x+4)(5x-4)