Plz help me it a math test and it timed

Find the value of x. round the length to the nearest tenth

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x

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.