1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ymorist [56]
3 years ago
8

Complex numbers [ = square root symbol -[-64 How would I find this?

Mathematics
1 answer:
cestrela7 [59]3 years ago
8 0

-\sqrt{-64}=-\sqrt{8^2\cdot (-1)}-8\sqrt{-1}=-8i

You might be interested in
Graph the circle (x+6)^2 + (y+5)^2 =9
Andrei [34K]

Answer:

This a circle centered at the point (-6,-5), and of radius "3" as it is shown in the attached image.

Step-by-step explanation:

Recall that the standard formula for a circle of radius "R", and centered at the point (x_0,y_0) is given by:

(x-x_0)^2+(y-y_0)^2=R^2

Therefore, in our case, by looking at the standard equation they give us, we extract the following info:

1)  R^2 = 9\,\,\,then\,\,\,R=3  since the radius must be a positive number and (R=-3) is not a viable answer.

2) x_0=-6    for ( x-x_0) to equal   (x+6)

3) y_0=-5    for ( y-y_0) to equal   (y+5)

Therefore, we are in the presence of a circle centered at the point (-6,-5), and of radius "3". That is what we draw as seen in the attached image.

5 0
3 years ago
The area of the circle is 144π m2<br><br> What is the diameter of the circle?
Over [174]

Answer:

Step-by-step explanation:

Remember that

Area of Circle = \pi r^2

\pi  = pi \\r = radius

They told us that for this circle, the area is 144\pi  m^2

If you put it back into the formula for area of a circle we get:

Area of Circle = \pi r^2

144\pi = \pi r^2

Divide both sides by \pi.

144 = r^2

Now we want to solve for r (r = radius).

You need to square root each side

\sqrt{144} = \sqrt{r^2}

12 = r

So now we know the radius, r = 12 metres

Also remember that

Diameter = 2r

So,

Diameter = 2 times 12 = 24 metres

5 0
3 years ago
April has 5 milligrams of zinc and 0.25 milligrams of copper.
GREYUIT [131]

Answer:

It's 4.75

Step-by-step explanation:

If you subtract 5-.25=? The answer would be 4.75. Hope this helps.

7 0
3 years ago
Alr, this is the last question im asking for today. pls help
JulsSmile [24]

you already know i gotchu :)

Answer: u = 5

Step-by-step explanation:

first, i moved the terms.

-4u + 10u = 37 - 7

then, i collected the like terms and calculated them.

6u = 30

finally, i divided both sides.

u = 5

4 0
3 years ago
DO NOT ANSWER IF YOU DO NOT KNOW
aliina [53]

Answer:

By saying "paying the same rate"

I believe you want to know for example when two people are buying a product how to know if they are paying the same amount.

If so then there are a couple of factors at play.

First of all you need to identify the GDP of the product and the amount of tax/VAT which if calculated properly may help you tell if they are paying the same amount or not.

3 0
3 years ago
Other questions:
  • (50 points) <br><br><br> answer NEEDED ASAPP
    13·2 answers
  • In a previous​ year, 58​% of females aged 15 and older lived alone. A sociologist tests whether this percentage is different tod
    15·1 answer
  • What is the estimated sum of 6/7+4/7<br> A.1/2<br><br> B.1<br><br> C.1 1/2<br><br> D.2
    14·1 answer
  • The sunshine Club collected 524 cans for a canned food drive. the cans were then split up equally into 8 boxes.
    15·1 answer
  • A grocery store recently sold a bag of peanuts for $0.76 and a bag of pistachios for $3.68. At the end of that day, 50 bags of p
    7·1 answer
  • You claim you are psychic and can predict a coin flip 60% of the time. To test your claim, your friend has you predict a coin fl
    12·1 answer
  • My lunch<br> was $5.65. If this is<br> my change, how much did <br> give the cashier?
    8·1 answer
  • Which valve is closest to 85% of 25
    7·1 answer
  • The sum of a number y and 6.2 is at least -4.7<br> inequality:
    8·1 answer
  • A sound wave is modeled with the equation y = 1 4 cos 2 π 3 θ . a. Find the period. Explain your method. b. Find the amplitude.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!