3 years ago

Please help!! Will give brainliest!!!

Mathematics

1 answer:

uranmaximum [27]3 years ago

5 0

Answer:

I cannot understand your question

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vaieri [72.5K]

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its 136

Step-by-step explanation:

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3 years ago

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What is the sum of one-sixth of x and 2.8?

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The answer is 2.8x! hope it helps

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3 years ago

1. The sum of first n terms of an arithmetic sequence is 3n²+4n

valentina_108 [34]

Answer:

Step-by-step explanation:

$a_1=S_1=3\cdot1^2+4\cdot1=3+4=7$

$a_1+a_2=S_2\\\\a_1+a_1+d=3\cdot2^2+4\cdot2\\\\7+7+d=3\cdot4+8\\\\14+d=12+8\\\\d=6\\\\\\a_n=a_1+d(n-1)\\\\a_n=7+6(n-1)\\\\a_n=7+6n-6\\\\\underline{a_n=7n+1}$

$a_{20}=7\cdot20+1=141$

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3 years ago

3. Jim bought a new pair of glasses. The lenses had six sides. The lenses were in the shape of a A. hexagon. B. heptagon. C. qua

Vladimir [108]

Best Answer:<span> </span><span>6 sides is a hexagon.

the spoke of a wheel is like a radius. Circumference is equal to 2πr so r = 42/2π ≈ 6.69 inches, ans. D.

that's it! ;)</span>

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3 years ago

Dean invests $500 for 10 years at a rate of 1.7% per year simple interest. Calculate the total interest earned during the 10 yea

Ann [662]

Answer: $85

Explanation:

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3 years ago