I)
Find the first term of a G. P. whose fifth term is 243 and the
common ratio 3.

first term = 3

Step-by-step explanation:

The n th term of a GP is

= a₁

where a₁ is the first term and r the common ratio

Here r = 3 and a₅ = 243 , thus

a₁ × = 243

a₁ × 81 = 243 ( divide both sides by 81 )

a₁ = 3

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

600,000,000,000, or 6e14

step-by-step explanation: