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nordsb [41]
3 years ago
7

What is the negative reciprocal of 2

Mathematics
1 answer:
Zinaida [17]3 years ago
3 0

Answer:

- \frac{1}{2}

Step-by-step explanation:

The reciprocal of a number n is \frac{1}{n}

The negative reciprocal is the negative of this, thus

reciprocal of 2 is - \frac{1}{2}

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A bag contains 25 balls 20 of which are blue what percentage of balls are not blue
Artist 52 [7]

Answer:

20%

Step-by-step explanation:

20/25 = blue

This means 5/25 of the balls in the bag are NOT blue

(25-20 = 5)

We need to convert 5/25 to a percentage

\dfrac{5}{25} = \dfrac{5\times4}{25\times4}=\dfrac{20}{100}

% = per cent

"per" means "out of"

"cent" means "one hundred"

so

20/100 = 20%

7 0
2 years ago
What is the cost of 20pens is rs 1200,what is the cost of one pen​
myrzilka [38]

Answer:

rs 60

1200/20=60......

3 0
3 years ago
The CEO of NJAD, a Real Estate Investment Fund, decided to design a new development inPolycity, New Jersey. She wants to build 3
shutvik [7]

The perimeter (P) is the sum of all sides:

\begin{gathered} (2x^2-6x+25)+(5x^3+6x^2-3x+4)+(x^3-2x^2+8x+9)+(3x^4+2x^3+8x+7) \\ 2x^2-6x+25+5x^3+6x^2-3x+4+x^3-2x^2+8x+9+3x^4+2x^3+8x+7 \\ 3x^4+5x^3+x^3+2x^3+2x^2+6x^2-2x^2-6x-3x+8x+8x+25+4+9+7 \\ 3x^4+8x^3+6x^2+7x+45 \end{gathered}

5 0
1 year ago
Solve system by Substitution<br> method, provide steps.<br> y = 5x - 18<br> -5x+6y = 17
Sedaia [141]

Answer:

x=5

Step-by-step explanation:

-5x+6(5x-18)=17

-5x+30x-108=17

25x-108=17

25x=17+108

25x=125

x=5

5 0
3 years ago
Find the determinant of the given matrix.
JulijaS [17]

Answer: -42


Step-by-step explanation: 2*2 matrices are easy to find the determinant with. Its just ad-bc, so (5*-2)-(4*8), which is -42


3 0
3 years ago
Read 2 more answers
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