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zalisa [80]
3 years ago
9

Hello, how can I do this exercise the help is appreciated

Mathematics
1 answer:
Semenov [28]3 years ago
7 0

Answer:

5, 8, 11, 14, 17,....

f(n) = 5+3n where n is the number of steps after the first two. 7 steps is 20 faces.

Step-by-step explanation:

A sequence is a list of numbers that are related. The first number in the sequence is 5 since the first part of the stairs has 5 faces (5 squares, the dark don't count). Every time you add a "stair" you add 2 blocks - one underneath to support and one as the step. This adds 3 faces. So 5 becomes 8. Repeat and 8 becomes 11. You add 3 faces each time. So the sequence is

5, 8, 11, 14, 17,....

This is a constant pattern of adding 3 each time after the initial start. So we can write a rule. We start with 5 + 3(each stair step). So if the cube is 7 stairs high, that is 5 more repetitions of adding blocks after the start (remember the start has 2 steps already). So 5 + 3(5) = 20. 7 steps high will have 20 faces.

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3 years ago
The final exam of a particular class makes up 40% of the final grade, and Moe is failing the class with an average (arithmetic m
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Answer:

%82.5

Step-by-step explanation:

  1. The final exam of a particular class makes up 40% of the final grade
  2. Moe is failing the class with an average (arithmetic mean) of 45% just before taking the final exam.

From point 1 we know that Moe´s grade just before taking the final exam represents 60% of the final grade. Then, using the information in the point 2 we can compute Moe´s final grade as follows:

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\frac{ FG-0.60*0.45}{0.40}=FE.

So, in order to receive the passing grade average of 60% for the class Moe needs to obtain in his exam:

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That is, he need al least %82.5 to obtain a passing grade.

6 0
3 years ago
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Answer:

Different ways to answer this question

Step-by-step explanation:

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Gina invested $10,000 at 1.5% interest compounded annually. How much interest will Gina earn in 2 years
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Y = mx +/- b

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3 years ago
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