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makvit [3.9K]
2 years ago
8

Every positive real number has a positive and a negative square root, the ________ root is called the principal root. *

Mathematics
1 answer:
fomenos2 years ago
5 0

9514 1404 393

Answer:

  B) positive

Step-by-step explanation:

For even-index roots, which may be either positive or negative, the <u> </u><u><em>positive</em></u><u> </u> root is called the principal root.

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A 42inch board is cut into pieces . one piece is two times the length of the order
aksik [14]

Answer:

14 and 28 in

Step-by-step explanation

the ratio= 2:1

so thre are 3 parts

42/3 = 14

multiply by 2 and get 28

5 0
3 years ago
It takes 3/4 of an hour to paint 3/5 of a room. How long does it take to paint a room?
Dmitry [639]

Answer:

1 1/4 hours

Step-by-step explanation:

.75/.6=x/1

cross multiply

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3 0
2 years ago
a circle has a diameter of 10cm what is the best proximation of this area use 3.14 to approximate for pi
hammer [34]
Hello!

The answer would be 75.8^{cm2}

Hope this helped!
4 0
3 years ago
Read 2 more answers
The value of Peter's house has risen 10% a year for the last 3 years. if the value of Peter's home 3 years ago was $120,000.00,
pickupchik [31]
The answer is $132,000

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5 0
3 years ago
How do you find the x intercepts of 3x^(5/3) - 4x^(7/3)
kaheart [24]
Set the whole expression = to 0 and solve for x.

3x^(5/3) - 4x^(7/3) = 0.  Factor out x^(5/3):     x^(5/3) [3 - 4x^(2/3)] = 0

Then either x^(5/3) = 0, or 3 - 4x^(2/3) = 0.

In the latter case, 4x^(2/3) = 3. 

To solve this:  mult. both sides by x^(-2/3).  Then we have

4x^(2/3)x^(-2/3) = 3x^(-2/3),            or 4 = 3x^(-2/3).  It'd be easier to work with this if we rewrote it as

4           3
---  = --------------------
1            x^(+2/3)

Then 

4
---  = x^(-2/3).  Then, x^(2/3) = (3/4), and x = (3/4)^(3/2).  According to my     3                      calculator, that comes out to x = 0.65 (approx.)

Check this result!  subst. 0.65 for x in the given equation.  Is the equation then true?

My method here was a bit roundabout, and longer than it should have been.  Can you think of a more elegant (and shorter) solution?
7 0
3 years ago
Read 2 more answers
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