<span>2n + 5 – (3n + 7) + 4n – 9
</span> <span>6n + 5 – (3n + 7) – 9
</span> <span>6n – 4 – (3n + 7)</span>
<span>6n – 4 – 3n – 7
</span> <span>3n – 4 – 7
</span> <span>3n –11</span>
Answer:
1)2(lb+bh+hl)
=2(17*12+12*8+8*17)
=2(204+96+136)
=2*436
=872 in^2
2)2*pi*r(r+h)
=2*3.14*14(14+29)
=6.28*14(43)
=6.28*14*43
=3780.56 mm^2
3)A=11*4.3+3*6 +3*8+11*3(Area of each plane figure -triangle and rectangle)
=47.3+18+24+33
=122.3cm^3
4)h*(sum of II sides)+14*8+19*8+14*8+25(Area of plane surface-trapezium,rectangle,square)
=12.1(19+5)+112+152+112+25
=12.1*24+401
=290.4+401
=691.4ft^2
The explicit formula is 
and the sum of the first 25 terms is approximately 512
<h3>The explicit formula</h3>
The given parameters are:
Set n = 0
Substitute 256 for a0
This means that the common ratio is 0.5.
The explicit formula is then represented as:
This gives
<h3>The sum of the first 25 terms</h3>
This is calculated using:
This gives
Evaluate
Hence, the sum of the first 25 terms is approximately 512
Read more about geometric series at:
brainly.com/question/24643676
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Answer:
76
Step-by-step explanation:
6+13=19
19/2=9.5
9.5x8=76
