All categories

3 years ago

Which of the following is a complex number?

Mathematics

1 answer:

Paraphin [41]3 years ago

4 0

You'll be disappointed to find out these are *all* complex numbers, because the set of real numbers is a subset of the complexes.

Probably the question means to ask, "which of these numbers is strictly non-real?" in which case D would be the answer because it contains the square root of a negative number that introduces the imaginary unit <em>i</em>. All the other options are strictly real numbers.

You might be interested in

Solve the equation to find where the treste ground levelEnter your answers from least to greatest and round to the nearest The m

DaniilM [7]

Answer:

The trestle meets ground level at 0.875 units and 9.125 units

Step-by-step explanation:

Poorly formatted question.

The given equation is:

$y = -x^2 + 10x - 8$

Required

The point where the trestle gets to the ground level

To do this, we set $y = 0$

So, we have:

$-x^2 + 10x - 8 = 0$

Multiply through by -1

$x^2 -10x + 8 = 0$

Solve using quadratic formula:

$x= \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

Where:

$a = 1; b =-10; c = 8$

So, we have:

$x= \frac{-(-10) \± \sqrt{(-10)^2 - 4*1*8}}{2*1}$

$x= \frac{-(-10) \± \sqrt{68}}{2*1}$

$x= \frac{-(-10) \± 8.25}{2}$

$x= \frac{10 \± 8.25}{2}$

Solve the fraction

$x= 5 \± 4.125$

Split

$x= 5 + 4.125\ or\ x= 5 - 4.125$

$x= 9.125\ or\ x= 0.875$

7 0

3 years ago

Given two different circles O and Q, which of the following cases presents two circles with no (zero) common tangents?

borishaifa [10]

Concentric circles because if a line is tangent to one circle, it would only intersect teh other

3 0

3 years ago

Read 2 more answers

How do i translate 70% of 120 is ?

garik1379 [7]

Multiply 120 times .7 because you just Turn the percent into a decimal

3 0

2 years ago

Read 2 more answers

2+2+3+8+3+8+6+4+0+8+4

Serhud [2]

Answer:

Step-by-step explanation:

8 0

3 years ago

Jamie is x years old. His friend Ana is the same age. Enter and expression in the box to represent the sum of Jamie and Ana ages

Lubov Fominskaja [6]

If Jamie's age is represented as x and given that Ana is the same age as Jamie then, Ana's age can also be represented by x. The sum of their ages is equal to,

Sum of their ages = x + x

Simplifying,

Sum of their ages = 2x

4 0

3 years ago

Read 2 more answers