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miv72 [106K]
3 years ago
13

Find the sum of the arithmetic series 7+13+...+601.

Mathematics
1 answer:
Juliette [100K]3 years ago
5 0

Answer:

Step-by-step explanation:

d=13-7=6

Let number of terms=n

l=a+(n-1)d

601=7+(n-1)6

601=7+6n-6

601=6n+1

6n=601-1=600

n=600/6=100

s_{n}=\frac{n}{2} (a1+an)\\=\frac{100}{2}(7+601)\\=50 \times 608\\=30400

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Two number cubes are rolled.
yaroslaw [1]

Answer:

1/4

Step-by-step explanation:

Assuming the number cube is a six-faced die, you have

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three odd numbers, and three even numbers. Therefore, the chance of it landing on an odd number or even number is 3/6, which equals 1/2. <em>That means you have a 50% chance to get an odd number, or an even number.</em>

<em />

So, you have two die. Both have a 50/50 chance of getting an even or odd number. So what's the chance of one landing on an odd number, and the other landing on an even number?

  • You would have a 25% chance for an <u>even</u> and then an <u>even</u> number
  • You would have a 25% chance for an <u>odd</u> and then an <u>odd</u> number
  • You would have a 25% chance for an <u>even</u> and then an <u>odd</u> number
  • You would have a 25% chance for an <u>odd</u> and then an <u>even</u> number.

25% as a simplified fraction is 1/4. Therefore, 1/4 is your answer.

8 0
3 years ago
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Can someone please help me
djyliett [7]

Slope = (10 - 5)/(-9 + 15) = 5/6

y = mx + b where m = slope and b = y-intercept

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X-intercept when y = 0

So

5/6 x + 17.5 = 0

5/6 x = -17.5

x = (-17.5) (6/5)

x = -21

Answer

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3 years ago
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3 years ago
What's the answer to this question?
S_A_V [24]
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4 years ago
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babymother [125]

Answer:

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3 0
3 years ago
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