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3 years ago

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Mathematics

1 answer:

Sergeeva-Olga [200]3 years ago

3 0

Answer:

if u divide it then slop it u will get your answer

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What is the probability of getting 60% or better on a true false exam with 50 questions

Ipatiy [6.2K]

Answer:

41.1764...%

Step-by-step explanation:

60% on 50 questions is 30/50 correct since 30÷50=.6=60%

Between 30 and 50(inclusive) there are 21 numbers.(30,31,32...49,50).

There are 51 possibilities of scores,1-50/50 or 0/50

21/51=0.411764...

3 0

3 years ago

Find the sum of the first 8 terms of the following sequence. Round to the nearest hundredth if necessary

AlexFokin [52]

The sum of the first 8 terms is 2.51 to the nearest hundredth

Step-by-step explanation:

In the geometric sequence there is a constant ratio between each two consecutive terms

The formula of the sum of n terms of a geometric sequence is:

$S_{n}=\frac{a(1-r^{n})}{1-r}$ , where

a is the first term
r is the constant ratio between the consecutive terms

∵ The sequence is 6 , -5 , 25/6 , .............

∵ -5 ÷ 6 = $\frac{-5}{6}$

∵ $\frac{25}{6}$ ÷ -5 = $\frac{-5}{6}$

- There is a constant ratio between the consecutive terms

∴ The sequence is a geometric sequence

∵ The first term is 6

∴ a = 6

∵ The constant ratio is $\frac{-5}{6}$

∴ r = $\frac{-5}{6}$

∵ We need to find the sum of 8 terms

∴ n = 8

- Substitute the values of a, r and n in the rule above

∴ $S_{8}=\frac{6[1-(\frac{-5}{6})^{8}]}{1-(\frac{-5}{6})}$

∴ $S_{8}=2.511595508$

- Round it to the nearest hundredth

∴ $S_{8}=2.51$

The sum of the first 8 terms is 2.51 to the nearest hundredth

Learn more:

You can learn more about the sequences in brainly.com/question/7221312

#LearnwithBrainly

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3 years ago

Vertical angles are...? i

gregori [183]

Answer:

Vertical angles are pair of angles made by intersecting two lines .

Step-by-step explanation:

In the image below a° and b° are vertical angles. "Vertical" refers to the vertex (where they cross), NOT up/down

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3 years ago

A 12-foot ladder is leaning against a wall. The bottom of the ladder is 5 feet away from the bottom of the wall. Approximately h

KonstantinChe [14]

D) 10.9

pythagorean theorem
144=25+x^2
10.9=x

6 0

3 years ago

Read 2 more answers

Calvin hiked 2,384 miles last year. This year, he has hiked 3,763 miles. How many miles has Calvin hiked in the past two years i

const2013 [10]

Answer:

The answer to this question is 6,147.

Step-by-step explanation:

2,384 + 3,763=6,147

5 0

2 years ago