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4 years ago

6

What is the square root of -1?

1 answer:

Westkost [7]4 years ago

3 0

Answer:

$\sqrt{i}$

Step-by-step explanation:

i = -1

This is a complex number

in here we take -1 = i

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Please answer right away

fenix001 [56]

The coefficient of determination is the first one. I'm pretty sure.

6 0

3 years ago

HELP QUICK! On a coordinate plane, the coordinates of vertices R and T for a polygon are R(−6, 2) and T(1, 2). What is the lengt

Savatey [412]

They are both on the 2 of the y-axis, so now all you have to do is subrtact the x-axis coordinate of R by the x-axis coordinate of T. That would be (-6)-5 = -11. YOUR ANSWER IS NOT -11. Signs don't matter when your attempting to find distance. Just forget the negative sign(-). It has nothing to do with the answer.
YOUR ANSWER IS 11 UNITS!!!

7 0

3 years ago

A right triangular prism is shown. A right triangular prism is shown. The right triangles have sides with lengths 15 and 8. The

Strike441 [17]

Answer:

900 cubic units

Step-by-step explanation:

V= base area *height of prism

Area of base is 1/2*15*8 =60

V=60*15

V=900

3 0

3 years ago

Read 2 more answers

Last time, one out of every 4 students in our class was absent. This time, after Jen came back, only one out of every 5 students

VMariaS [17]

Answer: There are 20 students and 4 students are not here today.

Step-by-step explanation:

If the number of students = 4

Let the number of students be 'x'.

Fraction of students absent = $\dfrac{x}{4}$

If the number of students = 5

Fraction of students absent = $\dfrac{x}{5}$

And Jen came back,

So, the fraction of student absent is also written as

$\dfrac{x}{4}-1$

According to question, it becomes,

$\dfrac{x}{5}=\dfrac{x}{4}-1\\\\\dfrac{x}{5}=\dfrac{x-4}{4}\\\\4x=5(x-4)\\\\4x=5x-20\\\\4x-5x=-20\\\\-x=-20\\\\x=20$

Hence, there are 20 students in our school.

And number of students are not here today is $\dfrac{20}{5}=4$

3 0

3 years ago

What is the length of s?

vovangra [49]

Answer:

s = 16.97 units

Step-by-step explanation:

Since this is a right triangle, we can use trigonometry to figure out the lengths of the sides.

Look at the 45 degree angle. We can use the opposite side (12) and the hypotenuse (s) to solve for s.

Opposite and hypotenuse is sine, so we are using sine. The sine of 45 degrees is 0.70710678118. Make an equation like so:

0.70710678118 = $\frac{12}{s}$ , and we are solving for s.

Put a 1 in the denominator of sine(45 degrees) so you can cross-multiply.

$\frac{0.70710678118}{1} =\frac{12}{s}$

Cross multiply.

0.70710678118s = 12

Divide both sides by sine(45 degrees).

s = 16.97

The length of side s is 16.97 units.

Another way to have done this problem is to use the Pythagorean theorem: a^2 + b^2 = c^2

Substitute 12 for a and b and solve for c, the hypotenuse.

(12)^2 + (12)^2 = c^2

Evaluate the exponents.

144 + 144 = c^2

Add them together.

288 = c^2

Square root 288 to solve for c.

c = 16.97, which is the same answer as you got using trigonometry.

6 0

3 years ago