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2 years ago

The answer please answer

Mathematics

2 answers:

Mariana [72]2 years ago

7 0

Answer:

option c

Step-by-step explanation:

the answer is option a because you are trying to solve _____ - 4 (since for students left early) = 12 (since that is how many students are left)

so, you can reverse the equation, if that makes sense, and make it look like 12+4=_____ (fact families)

12+4=____

12+4=16

stealth61 [152]2 years ago

3 0

So basically . Four plus Twelve equals Sixteen

The answer would be, 16

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Lucia flips a coin three times. What is the probability she gets (Head, tail, Head) in that order?

Svetach [21]

Answer: $\dfrac{1}{8}$

Step-by-step explanation:

The total outcomes of tossing a coin = 2

The total number of possible outcomes of flipping coin three times =2 x 2 x 2 = 8

Favorable outcome= (Head, tail, Head) in order

i.e. Number of Favorable outcomes = 1

We know that , Probability = $\dfrac{\text{Favorable outcomes}}{\text{Total outcomes}}$

Therefore , The required probability $=\dfrac{1}{8}$

Hence , the probability she gets (Head, tail, Head) in that order $=\dfrac{1}{8}$

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3 years ago

A customer sent in a $230 check to pay off an overdue bill but failed to pay the interest that accrued over the 45 days after th

viva [34]

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3 years ago

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mart [117]

Answer:

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Step-by-step explanation:

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3 years ago

Write the following sum using summation notation -2/5+3/6-4/7........11/14

horrorfan [7]

Answer:

$\sum_{n=1}^{10}(-1)^n\left ( \frac{n+1}{n+4} \right )$

Step-by-step explanation:

Given: $\frac{-2}{5}+\frac{3}{6}-\frac{4}{7}+...+\frac{11}{14}$

To write: the given expression using summation notation

Solution:

Summation notation helps to write a long sum as a single expression.

In the summation notation, the variable $\sum$ is called the index of summation.

Let $x_1,x_2,x_3,...,x_n$ denote a set of n numbers.

Then in summation notation,

$x_1+x_2+x_3+...+x_n=\sum_{i=1}^{n}x_i$

$\frac{-2}{5}=(-1)^1\left ( \frac{1+1}{1+4} \right )\\\frac{3}{6}=(-1)^2\left ( \frac{2+1}{2+4} \right )\\\frac{-4}{7}=(-1)^3\left ( \frac{3+1}{3+4} \right )\\.\\.\\.\\\frac{11}{14}=(-1)^10\left ( \frac{10+1}{10+4} \right )\\\therefore \frac{-2}{5}+\frac{3}{6}-\frac{4}{7}+...+\frac{11}{14}=\sum_{n=1}^{10}(-1)^n\left ( \frac{n+1}{n+4} \right )$

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2 years ago

Am I right? please only answer if you are positive that you’re correct. thank you!

gavmur [86]

Answer:

yes you are correct :)))

5 0

1 year ago