All categories

3 years ago

Which expression is equivalent to (2−√−4)+(1+√−49)? 3−5i 3+5i 8+0i −2+0i

Mathematics

1 answer:

sergij07 [2.7K]3 years ago

3 0

Answer:

3 + 5i.

Step-by-step explanation:

(2−√−4)+(1+√−49)

√−4 = 2i and

√−49 = 7i.

So (2−√−4 + (1+√−49

= ( 2 - 2i) + (1 + 7i)

= 3 + -2i + 7i

= 3 + 5i.

You might be interested in

jane loves animals. She has an equal number of beetles, birds and spiders as pets. Apart from human legs, there is a total of 27

kherson [118]

Answer:

16.875 spiders

Step-by-step explanation:

Given

Let

$B = Beetles$

$C = Birds$

$S = Spiders$

So, we have:

$B = C = S$ --- equal amounts

$6B + 2C + 8S = 270$ --- the legs

Required

The number of spider

Since she has an equal amount of B, C and S;

The expression can be written as:

$6B + 2C + 8S = 270$

$6S + 2S + 8S = 270$

$16S = 270$

Solve for S

$S = \frac{270}{16}$

$S = 16.875$

The result of the solution does not represent real life situation because it it is not possible to have a fraction number of spider

5 0

3 years ago

What is a predicate of a sentence ? like:

sesenic [268]

$\color{voilet}\huge{AN}$ $\color{yellow}\huge{S}$ $\color{blue}\huge{W}$ $\color{orange}\huge{ER}$

The predicate is (turn yellow in the fall).

⠀

Because the subject in the sentence is the leaves

8 0

3 years ago

Please help math find the measure angle x in the figure below

djyliett [7]

Answer:

Mm I didn't get the picture

8 0

3 years ago

4 What is the slope of the line represented by the table of values below?

Kobotan [32]

Answer:

Step-by-step explanation:

In order to find slope you have to follow the formula

(y2-y1) / (x2-x1)

That would give you the slope which in this case is 10.

8 0

3 years ago

Write the quadratic equation whose roots are 2 and -4 and whose leading coefficient is 2

Goryan [66]

Answer:

2x^2+4x-16

Step-by-step explanation:

The quadratic can be written as

f(x) = a(x-z1)(x-z2) where z1 and z2 are the roots

f(x) = a (x-2)(x- -4)

a is the leading coefficient

f(x) = 2(x-2)(x+4)

= 2(x^2 -2x+4x-8)

= 2(x^2 +2x-8)

= 2x^2 +4x-16

5 0

3 years ago