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4 years ago

What is the square root of -1?

Mathematics

1 answer:

Lera25 [3.4K]4 years ago

4 0

Answer:

$i$

Step-by-step explanation:

$\sqrt{-1}$

The square root of -1 is undefined and has no solutions.

If we apply imaginary number rule $\sqrt{-1}=i$

Then $\sqrt{-1}$ equals $i$ .

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3x less than 2 times the sum of 2x and 1 is equal to the sum of 2 and 5

AlexFokin [52]

Answer:

Step-by-step explanation:

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3 years ago

The marked price of an article is 30% above it's selling price and the cost price is 35%less than it's marked price. find the di

SashulF [63]

Answer:

Let C be the cost price of the article. Then:

C(1+30%)=marked price

So:

C(1+30%)=C(1.3)

=1.3C

If the article is then marked down 35%, then its’ price would be:

1.3C(1–35%)=1.3C(.65)

=0.845 or 84.5% of its’ cost

Then:

0.845–1=-0.155

or, a 15.5% loss on the item

8 0

4 years ago

HELPPPPP!!!!!!! PLEASESWE

harina [27]

What you are trying to do, I don't know. I will combine them for you.

8)

$\displaystyle \frac{6}{x-1} - \frac{5x}{4} \\ \\ = \frac{4(6)}{4(x-1)} - \frac{5x(x-1)}{4(x-1)} \\ \\ 
= \frac{24}{4(x-1)} + \frac{-5x(x-1)}{4(x-1)} \\ \\
= \frac{24}{4(x-1)} + \frac{-5x^2+5x}{4(x-1)} \\
= \frac{24 - 5x^2 + 5x}{4(x-1)}$

____________________

9)

$\displaystyle 
\frac{3}{x+7} + \frac{4}{x-8} \\ \\ = 
\frac{3(x-8)}{(x+7)(x-8)} + \frac{4(x+7)}{(x+7)(x-8)} \\ \\ =
\frac{3x-24}{(x+7)(x-8)} + \frac{4x+28}{(x+7)(x-8)} \\ \\ =
\frac{3x-24}{(x+7)(x-8)} + \frac{4x+28}{(x+7)(x-8)} \\ \\ =
\frac{7x + 4}{(x+7)(x-8)}$

5 0

3 years ago

I need help please yall <br><br>use orders of operation and simplify

UNO [17]

Answer: $\large\boxed{12x^3-30x+3=0}$

Step-by-step explanation:

$Solve:\\\ 6(2x^2-5)x=-3\\\\Use\ distributive\ property\ first\\\\(12x^2-30)x=-3\\\\Now\ multiply\ the\ terms\ in\ ()\ by\ 'x'\\\\12x^3-30x=-3\\\\\large\boxed{12x^3-30x+3=0}$

4 0

2 years ago

Carrie sent 190 total text messages in the first

ratelena [41]

190 / 5 = 38
38 * 31 = 1178
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= $47.12

8 0

3 years ago