All categories

3 years ago

If 2/3 = a/15 , then a = ______.

Mathematics

2 answers:

Snowcat [4.5K]3 years ago

6 0

Answer: if 2/3 = a/15 , then a = 10

Step-by-step explanation:

15 / 3 = 15

5 * 2 = 10

a = 10

7nadin3 [17]3 years ago

3 0

Answer:

2/3=a/15

then cress cross

3*a=2*15

3a=30

a=30/3

:a=10

You might be interested in

Write the following phrase as an expression.<br> half of n

PtichkaEL [24]

Translating the half to symbols would be 1/2. Therefore, your answer is 1/2(n)

Hope this helps!

3 0

4 years ago

Read 2 more answers

If the expected value (the mean) of successes in a binomial experiment of 100 trials is 55. Which of the following are not true?

Elis [28]

Answer:

All of the statements are true

Step-by-step explanation:

Given that :

Number of trials (n) = 100

Expected number of successes = 55

The number of successes of the 100 trials :

Number of successes / number of trials = 55 / 100 = expected number of successes / n = 55/ 100 = 0.55

Using Normal approximation :

Standard deviation (σ) = √(npq) ; q = 1 - p = 1 - 0.55 = 0.45

σ = √(100 * 0.55 * 0.45) = √24.75 = 4.975

The probability distribution of x = B(n, p) = x = B(100, 0.55)

Using approximation ; N(p, σ) = N(55, 4.97)

Hence, All of the statements are true

7 0

3 years ago

The diameter of a circle is 18 inches. What is the length of a 90° arc?

Alona [7]

Answer:

AHH! Geometry!

14.1375

Step-by-step explanation:

So to get the answer, we are going to have to make a "factor"

We first do this:(Circles have an angle of 360)

$\frac{90}{360} =\frac{1}{4}$

This tells how long the arc is in comparison to the circumference!

So let's solve the circumference!

$P=D\pi \\P=18\pi \\P=About 56.55$

Now, Multiply!

$56.55*\frac{1}{4} = 14.1375$

There we go!

Hope this helps!

See Ya!

5 0

3 years ago

Question 4

erica [24]

Answer:

Step-by-step explanation:

........................

3 0

3 years ago

Two friends share 3 fruit bars equally.How much does each friend get

Mandarinka [93]

You have to dived three by 2, therefore, 3/2 equals...1.5

6 0

3 years ago

Read 2 more answers