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3 years ago

What is the square root of -1?

Mathematics

2 answers:

sladkih [1.3K]3 years ago

5 0

The answer to your problem is----> i

solmaris [256]3 years ago

3 0

$\sqrt{-1} = i$

However, in Real Number System, you can't find the value of square root of negative numbers. The above one is the imaginary number.

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Find the length of a rectangle with a perimeter of 76 inches and width of 16 inches.

levacccp [35]

Answer:

22 inches

Step-by-step explanation:

Width (16) x 2 = 32

72 (perimeter) - 32 (width x 2) = 44 inches

44 divided by 2 is 22, which is the length.

3 0

2 years ago

Read 2 more answers

John’s father is 5 times older than John and John is twice as old as his sister Alice. In two years time, the sum of their ages

oksano4ka [1.4K]

Answer:

John’s age is 8 years

Step-by-step explanation:

Let

x -----> John’s father's age

y -----> John’s age

z -----> John’s sister's age

we know that

$x=5y$ -----> equation A

$y=2z$

$z=y/2$ -----> equation B

$(x+2)+(y+2)+(z+2)=58$

$x+y+z+6=58$

$x+y+z=52$ -----> equation C

Substitute equation A and equation B in equation C and solve for y

$5y+y+y/2=52$

Multiply by 2 both sides to remove the fraction

$10y+2y+y=104$

$13y=104$

$y=8$

<em>Find the value of x</em>

$x=5(8)=40$

<em>Find the value of z</em>

$z=8/2=4$

therefore

John’s father's age is 40 years

John’s age is 8 years

John’s sister's age is 4 years

7 0

3 years ago

What is 1/6 + 2/12 + 1/3 + 3/4 + 1/2 = ?

matrenka [14]

Answer:

$\frac{19}{12}$

Step-by-step explanation:

$\frac{1}{6} + \frac{2}{12} + \frac{3}{4} + \frac{1}{2}$

$\frac{2}{12} + \frac{2}{12} + \frac{9}{12} + \frac{6}{12}$

$\frac{19}{12}$

7 0

3 years ago

What is the meaning of the unknown factor and quotient

konstantin123 [22]

Unknown factor is multiplication and then quotient is division

5 0

3 years ago

The worlds two highest dams are both in Tajikistan. The rogue dam is 35 meters taller than the Nurek dam. together they are 635

galina1969 [7]

This is a sum and difference problem, with the equations
R-N=35
R+N=635
The solution of which is
R=(635+35)/2=335
N=(635-35)/2=300

In general, the sum and difference problem can be solved (most of the time mentally) using
Larger number = (sum + difference)/2
Smaller number = (sum - difference)/2

5 0

3 years ago