Find the product of 21 and (6.3x10^-4)

Find the vertex of the function given below y=x^2-6x+1

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?