Find the center and the radius of the circle with the equation:
x? + 6x + y2 + 4y + 12 = 0
a. center: (3, 2)
c. center: (6,4)
radius: 1
radius: 12
center: (-3,-2)
center: (-6,-4)
radius: 1
radius: 12

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

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

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.