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3 years ago

A teacher wants to test the effectiveness of two

Mathematics

1 answer:

GaryK [48]3 years ago

3 0

Answer: an experiment

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Devaughn's age is three times Sydney's age. The sum of their ages is 104 . What is Sydney's age?

aleksandr82 [10.1K]

Answer:

Step-by-step explanation:

u dont need it

5 0

3 years ago

Select the correct answer.

maks197457 [2]

Answer:

See Explanation

Step-by-step explanation:

Your question is poorly formatted. However, I'm able to deduce that your question involves at least 2 algebraic fractions that needs to be simplified.

So, I'll make use of the following expression:

$\frac{3n}{n + 3} + \frac{5}{n - 4}$

When you follow the steps I'm about to provide, you'll arrive at the right answer

Required

Determine an equivalent expression

$\frac{3n}{n + 3} + \frac{5}{n - 4}$

Step 1: Take L.C.M of the denominators

$LCM = (n+3)(n-4)$

Step 2: Evaluate the fractions

$\frac{3n}{n + 3} + \frac{5}{n - 4}$ $= \frac{3n(n-4)+5(n+3)}{(n+3)(n-4)}$

Step 3: Open the brackets at the numerator

$\frac{3n}{n + 3} + \frac{5}{n - 4}$ $= \frac{3n^2-12n+5n+15}{(n+3)(n-4)}$

Step 4: Collect and evaluate like terms

$\frac{3n}{n + 3} + \frac{5}{n - 4}$ $= \frac{3n^2-7n+15}{(n+3)(n-4)}$

<em>Follow the above steps, and you'll be able to solve your question.</em>

6 0

3 years ago

2) The following table presents the probability distribution of the number of vacations X taken last year for a randomly chosen

algol [13]

The mean of the discrete probability distribution is of 1.28.

<h3>What is the mean of a discrete distribution?</h3>

The expected value of a discrete distribution is given by the <u>sum of each outcome multiplied by it's respective probability</u>.

Then, considering the given distribution, the mean is given by:

E(X) = 0(0.13) + 1(0.61) + 2(0.15) + 3(0.07) + 4(0.04) = 1.28.

More can be learned about the mean of a discrete probability distribution at brainly.com/question/24855677

3 0

2 years ago

What is the circumference of a circle that has a radius of 10 in? Use 3.14 for π

nadya68 [22]

Answer:

circumference=πD

R=10

D=20

3.14*20

=68.2

Step-by-step explanation:

5 0

3 years ago

Alex spent $23 on a bus ride. The bus charges $0.35 a mile plus $2 a trip. How

Svetlanka [38]

67.7 cus 23 divided by .35 is 65.7+2 =67.7

7 0

3 years ago