Find the fourth term of the geometric sequence, given the
first term and common ratio.
ay=8 and r=4
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Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

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

Determine if the solution set for the system of equations shown is the empty set, contains one point or is infinite. x + y = 5 x + y = 7 {} 1 solution infinite