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3 years ago

What is 15/20 in a decimal ? plz explain .

Mathematics

2 answers:

Stella [2.4K]3 years ago

4 0

Answer:

0.75

Step-by-step explanation:

15/20 can be reduced to 3/4, which you can find using long division.

3/4 = 0.75

galben [10]3 years ago

3 0

Answer:

0.75

Step-by-step explanation:

To convert fraction into decimals, you have to divide the numerator by the denominator.

So, 15 divided by 20 is 0.75.

Also, if you didn't know the fraction bar is another way of writing the division sign ;)

Hoped This Helped!!

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For all positive integers n, let *n* equal the greatest prime number that is a divisor of n. What does *10*/*12* equal?

artcher [175]

9514 1404 393

Answer:

5/3

Step-by-step explanation:

The prime factorizations are ...

10 = 2·5

12 = 2·2·3

Then *10* = 5 and *12* = 3, so *10*/*12* = 5/3.

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2 years ago

How do you writ 1.660 in scientific notation

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Answer:

$1.66 * 10^{0}$

Step-by-step explanation:

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3 years ago

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2 years ago

What is -0.6(r+0.2) = 1.8 ???

lana66690 [7]

Answer:

r = -3.2

Step-by-step explanation:

-0.6(r+0.2) = 1.8

Divide by -.6

-0.6/-.6(r+0.2) = 1.8/-.6

r+.2 = -3

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2 years ago

Question 8 Find the unit vector in the direction of (2,-3). Write your answer in component form. Do not approximate any numbers

slamgirl [31]

Answer:

The unit vector in component form is $\hat{u} = \left(\frac{2}{\sqrt{13} },-\frac{3}{\sqrt{13}} \right)$ or $\hat{u} = \frac{2}{\sqrt{13}}\,i-\frac{3}{13}\,j$ .

Step-by-step explanation:

Let be $\vec u = (2,-3)$ , its unit vector is determined by following expression:

$\hat {u} = \frac{\vec u}{\|\vec u \|}$

Where $\|\vec u \|$ is the norm of $\vec u$ , which is found by Pythagorean Theorem:

$\|\vec u\|=\sqrt{2^{2}+(-3)^{2}}$

$\|\vec u\| = \sqrt{13}$

Then, the unit vector is:

$\hat{u} = \frac{1}{\sqrt{13}} \cdot (2,-3)$

$\hat{u} = \left(\frac{2}{\sqrt{13} },-\frac{3}{\sqrt{13}} \right)$

The unit vector in component form is $\hat{u} = \left(\frac{2}{\sqrt{13} },-\frac{3}{\sqrt{13}} \right)$ or $\hat{u} = \frac{2}{\sqrt{13}}\,i-\frac{3}{13}\,j$ .

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2 years ago