Find the 13th term of the arithmetic sequence -2x+8, 4x+2, 10x-4, ...
1 answer:
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Answer:
18
Step-by-step explanation:
I think the attached phôt below is your full question.
<u>And here is my answer: </u>
Surface area of a triangular prism = hight * area of the base
Here we have:
- h= 12
- Area of the base = 1/2 *2* 1.5 = 1.5
=> Surface area = 12*1.5 = 18
Answer:
2nd option
Step-by-step explanation:
r + 1 = 23 ( subtract 1 from both sides )
r = 22 ( multiply both sides by 3 to clear the fraction )
r = 66 ( divide both sides by
)
r = ×
( rationalising the denominator )
r = = 33