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Minchanka [31]
4 years ago
7

A bag contains 3 red marbles, 4 blue marbles, and 6 green marbles. Which pair of events are complementary events? A) choosing a

blue marble; choosing a green marble B) choosing a red marble; choosing a marble that is not blue C) choosing a blue marble; choosing a red marble D) choosing a green marble; choosing a marble that is not green
Mathematics
1 answer:
kotykmax [81]4 years ago
7 0

Answer:

Event D

Step-by-step explanation:

Complementary events are those events that are opposites of each other. i.e. in this case the complementary event for choosing a green marble is not choosing a green. It has nothing to do with choosing or not choosing marbles of colors other than green.

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What is the equation of the following graph?
boyakko [2]

Answer:

\frac{(x-1)^2}{5^2} -\frac{(y-2)^2}{2^2} =1

Step-by-step explanation:

Here you are require to find the equation of the hyperbola given that the center (h,k), the coordinates of the vertices and those of the co-vertices can be determined from the diagram given

The sharp turning points of the curves give the vertices at (-4,2) and (6,2)

Joining the vertices with a straight line will form the transverse axis with length 2a .

To find the length of the transverse axis 2a will be ; 6--4=10. 2a=10 hence a=10/2 =5

a=5

Find the center of the hyperbola at (h,k) by  finding the intersecting point of the diagonals of the rectangle in the diagram

The center identified will be (h,k) = (1,2)

To find the length of the conjugate axis 2b will be ; the length between points (1,4) and (1,0) which are the coordinates of the co-vertices in the hyperbola. 2b= 4-0=4 , b=4/2 = 2

b=2

The standard equation of the hyperbola with center (h,k) is written as ;

\frac{(x-h)^2}{a^2} -\frac{(y-k)^2}{b^2} =1

where  (h,k) is center of hyperbola, (h±a,k) is coordinate of the vertices and (h,k±b) are coordinates of co-vertices.

Substitute values of a, b, h, and k in equation as

\frac{(x-1)^2}{5^2} -\frac{(y-2)^2}{2^2} =1

7 0
3 years ago
The owner of a small restaurant bought 75 kilograms of rice. Each week, the restaurant uses 4.5 kilograms of rice.
leva [86]

Answer:

6 weeks 27kilo

12 weeks 54 kilo

Step-by-step explanation:

4.5*12=54

4.5*6=27

3 0
3 years ago
Solve for x: 5 over quantity x squared minus 4 plus 2 over x equals 2 over quantity x minus 2
dangina [55]
5/(x^2-4)+2/x=2/(x-2)  if we factor the leading denominator, it is a "difference of squares" of the form (a^2-b^2) which always factors to (a-b)(a+b) so we have:

5/((x-2)(x+2))+2/x=2/(x-2), to add/subtract fractions we need a common denominator, so in this case we need a common denominator of x(x-2)(x+2) so

5(x)+2(x+2)(x-2)=2(x)(x+2),  perform indicated operations...

5x+2(x^2-4)=2x(x+2)

5x+2x^2-8=2x^2+4x  subtract 2x from both sides

5x-8=4x  subtract 4x from both sides

x-8=0  add 8 to both sides

x=8

check...

5/(x^2-4)+2/x=2/(x-2) when x=8 so

5/(64-4)+2/8=2/(8-2)

5/60+1/4=2/6

5/60+15/60=20/60

20/60=20/60
3 0
3 years ago
Read 2 more answers
8. Graph: y = x2 + 5x - 1​
vredina [299]

Answer:

boyyyy

Step-by-step explain:

yayyy

7 0
3 years ago
Read 2 more answers
Pls help solve question 3
Lelu [443]

Answer:

If m is the midpoint of ab it means am is equal to mb

am = 3x + 8 and mb = 6x-4

and ab  = am + mb

first find the value of x by using am = mb

3x + 8 = 6x - 4

8 + 4 = 6x - 3x

12 = 3x

x = 4

ab = 3 (4) + 8

= 12 + 8 = 20 = mb

ab = am + mb

= 20 + 20

40

so, the value of ab is 40

4 0
3 years ago
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