What number would you add to the equation below to complete the square?
x2 + 5x = 0

A. 25/4
B. 4
C. 5/2
D. 25

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

See attachment below and find the equivalent of tan(∠qsr)

Consider this expression and the steps to evaluate it. 4^5(−2)^9/4^8(−2)^3 1. apply the quotient of powers:      (−2)^a/4^b 2. evaluate powers:           c/d select the value of each variable. a = _ b = _ c = _ d = _