Find the value of k for which the quadratic equation 4x2+kx+3=0 has equal roots.

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.

Subtract and simplify. (-y^2 – 4y - 8) – (-4y^2 – 6y + 3) show how you got the answer if your answer is right i will mark you

What is the perimeter of a rectangle if the length is 5 and the width is x?