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harina [27]
4 years ago
13

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:

5

Step-by-step explanation:

7 0
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
1178 * 4 = 4712
= $47.12
8 0
3 years ago
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