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3 years ago

What is an example of a number that is not real

Mathematics

2 answers:

kenny6666 [7]3 years ago

8 0

real numbers are:

whole numbers (0,1,2,3...)
rational numbers ( 1.1, 2/3...)
irrational numbers ( π...)

not real numbers are

imaginary numbers (√-1)
infinite numbers

kykrilka [37]3 years ago

7 0

An example is the number 5i

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Question 9

Alenkasestr [34]

Answer:

$PX=4\\PY=4\sqrt{3}$

Step-by-step explanation:

Let $\angle PYZ=Q$

$\Rightarrow \angle XYP=90-\angle PYZ\\\angle XYP=90-\theta$

In the $\Delta PYZ$

$\tan\theta =\frac{opposite}{adjacent}=\frac{PZ}{PY}......(1)$

In the $\Delta YPX$

$\tan(90-\theta)=\frac{opposite}{adjacent}=\frac{PX}{PY}$

$\cot=\frac{PX}{PY}....(2)$

eqn(1) $\times$ eqn(2)

$\tan\times\cot\theta=\frac{PZ}{PY}\times\frac{PX}{PY}\\\\1=\frac{PZ\times PX}{PY^2}\ \ (as\ tan\theta\ =\frac{1}{\cot\theta})\\\\PY^2=PZ\times PX\\PY^2=12PX.......(3)$

Now in $\Delta XYP$

use Pythagorean theorem

$XY^2=PY^2+PX^2\\8^2=PY^2+PX^2\ \ (as\ XY\ =8)\\PX^2+PY^2=64\\\\PY^2=12PX\ \ (eqn(3)\\\\\Rightarrow PX^2+12PX=64\\\\PX^2+12PX-64=0\\\\PX^2+16-4PX-64=0\\\\(PX+16)(PX-4)=0\\\\PX=4,\ -16$

Length can not be negative

Hence $PX=4$

$PY^2=12PX=12\times4=48\\\\PY=\sqrt{48}=4\sqrt{3}$

Hence $PX=4,\ PY=4\sqrt{3}$

8 0

3 years ago

a countrys population in 1995 was 162 million. in 1999 it was 167 million. Estimate the population in 2004 using the exponention

Tems11 [23]

Exponential growth formula says that the amount or population at time (tx) is equal to the amount or population (t0) multiplied to e ^ (rate of growth)(time from tx to t0). In this case, rate of growth can be obtained from the population from 1995 to 1999 and this rate will be used to calculate the present population in 2004. Therefore, the country's population in 2004 is approximately 174 million.

5 0

4 years ago

Read 2 more answers

=> Please Help Me With My Math <=

GuDViN [60]

Answer:

Step-by-step explanation:

6 0

3 years ago

What is the percentage of students with a score between 18 and 24

ivann1987 [24]

The answer to this question would be 3%

3 0

3 years ago

Given a triangle with a = 12, A = 13°, and B = 12°, what is the length of c? Round to the nearest tenth.

Leni [432]

Answer:

=5.1 units

Step-by-step explanation:

To use the sine rule to find the length of c we first need to find the angle at C.

C=180-(13+12)

C=180-25

C=155°

a/Sin A=c/Sin C

Calculating for the value of c using the sine rule:

12/Sin 13=c/Sin 155

c=12 sin 155

=5.07 units

Thus to 1 decimal places, the value of c is 5.1 units.

8 0

3 years ago