Find the number of real solutions of the equation y=5x^2+10x+3.

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.