What is the solution of the equation x2 + 10x + 75 = 0?

50 points~ ! i have to turn this in tomarrow

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.

The length of a rectangle plus its width is 24 cm. the area is 143 square cm. what are the length and width of the rectangle?