When calculating the circumference of a circle, sometimes the radius is given instead of the diameter. what is the relationship between radius and diameter?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

Which equation shows the quadratic formula used correctly to solve 5x2 + 3x -4 0 for x? cos -3+ v (3) 2-4() 2(5) 3+ |(3)² +4() 205) 3+ (3) 2-4() -3+ v (3)² +4()