book Maths Puzzle Numerical Ability

"Write the first four terms of the geometric sequence with the first term (a sub n = 16) and common ration r= -1/2.

Read Solution (Total 0)

book Other Question

I COLLECTED 4 TIMES AS MUCH MONEY AS DERRICK. WE COLLECTED A TOTAL OF $3900 HOW MUCH DID EACH OF US COLLECT. THIS ONE REALLY PUTS ME IN A STUMP HOLE THANKS FOR ANY HELP. SINCERLY KEVIN please help me solve this equation
Give a reason for each step in the proof.
given: m<1 and m<2 are a linear pair.m<1=130 degrees
Prove:m<2=50 dergees
Proof:
1.m<1=130 degree