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zhuklara [117]
3 years ago
8

PLEASE HELLLLP. WILL MARK BRAINLIEST 4 1ST ANSWER

Mathematics
1 answer:
Sever21 [200]3 years ago
8 0
Y=-4/3x-8 that is the equation
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There are approximately 4.3 million births in a country each year. Find the birth rate in units of births per minute.
Masja [62]

8.18 births per minute

5 0
3 years ago
Please help!<br> A- answer as a percent rounded to nearest tenth<br> B- answer as a fraction
Licemer1 [7]

a)  the Probability p( red, red, red) is 0.83%.

b) the probability p(white, red, white) is 0.

<u>Step-by-step explanation:</u>

The total number of marbles = 3+6+1.

                                                =10.

a) to find the Probability p( red, red, red).

p( red, red, red)= \frac{3C_{3} }{10C_{3}}.

p( red, red, red)=\frac{3}{10}×\frac{2}{9}×\frac{1}{8}.

p(red,red,red)= 0.0083.

p(red,red,red)=0.83%

b)to find the probability p(white, red, white).

p(white, red, white) is 0.

Since there is only one white.

6 0
3 years ago
Solve by using the quadratic formula 3x^2+5=-2x
rosijanka [135]

Hello from MrBillDoesMath!

Answer:   -1/3 + i* (1/3) * sqrt(14)  and  -1/3 - i* (1/3) * sqrt(14)

Discussion :

Recall the solutions of the quadratic equation  "ax^2 + bx + c = 0" are given by the formula

x = ( - b +/- sqrt (b^2 - 4ac) )  / 2a


Rewriting the given equation in this for gives

3x^2 + 2x + 5 = 0


so a = 3, b = 2, and c = 5.  Substituting the values in the formula gives


x =  (- 2 + sqrt ( 2^2 - 4*3*5)  ) / 2a         #1

and

x =  (- 2 - sqrt ( 2^2 - 4*3*5)  ) / 2a       #2


Simplifying, #1 = ( -2   + sqrt(4-60) )/ (2 * 3)  =

                           -2/(2*3)  +  (sqrt(-56)) / (2*3) =

                            -1/3  + i * (sqrt (56)) /6 =

                            -1/3 +  i * (sqrt(4 *14)) /6 =

                            -1/3  + i * (sqrt(4)/6) * sqrt(14)  =

                            -1/3 + i * (2/6) * sqrt(14) =

                            -1/3 + i* (1/3) * sqrt(14)


Similarly, the solution of # 2=   -1/3 - i* (1/3) * sqrt(14). The only difference between the two solutions is the minus sign boldfaced above.


Regards, MrB




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