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OlgaM077 [116]
3 years ago
15

The value of square root of -9 is not -3 because

Mathematics
1 answer:
andriy [413]3 years ago
6 0

Answer:

The square root of -9 cannot be -3 because -3 squared or -3 times -3 equals 9 not -9.

Hope this helps!

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Simplify (4x^2-7x+14)(3x+5x^2-6)<br> Please show work
tatiyna

Answer:

-23x^3+20x^4+25x^2+84x-84

Step-by-step explanation:

1 Expand by distributing sum groups.

4x^2(3x+5x^2-6)-7x(3x+5x^2-6)+14(3x+5x^2-6)

2 Expand by distributing terms.

12x^3+20x^4-24x^2-7x(3x+5x^2-6)+14(3x+5x^2-6)

3 Expand by distributing terms.

12x^3+20x^4-24x^2-(21x^2+35x^3-42x)+14(3x+5x^2-6)

4 Expand by distributing terms.

12x^3+20x^4-24x^2-(21x^2+35x^3-42x)+42x+70x^2-84

5 Remove parentheses.

12x^3+20x^4-24x^2-21x^2-35x^3+42x+42x+70x^2-84

6 Collect like terms.

(12x^3-35x^3)+20x^4+(-24x^2-21x^2+70x^2)+(42x+42x)-84

7 Simplify.

-23x^3+20x^4+25x^2+84x-84

4 0
2 years ago
If the radius of the circle above is 2 in, what is the area of the circle? A. 8 sq in B. 4 sq in C. 2 sq in D. 16 sq in
polet [3.4K]

Answer:

b

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Please help me!
Tomtit [17]
This is how it would work to find answer

You divide 225 by 45 and the answer you would get is 5 so

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hope this helps


3 0
3 years ago
Read 2 more answers
If the square root of 61 is the longest side length in the triangle and the shorter sides are x and x+1, find the value of x tha
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Answer:

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Step-by-step explanation:

You want to find x such that ...

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  x^2 +x -30 = 0 . . . . . . . divide by 2

  (x +6)(x -5) = 0 . . . . . . . . factor; solutions will make the factors be zero.

The relevant solution is x = 5.

5 0
2 years ago
Lucy took three tests. If her median score was 86, her mean score was 87, and the range was 13, what were her three test scores?
sveticcg [70]
      x+82+y
______________  =87
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y-x=17
87,98, and 82.
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3 years ago
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