NinjaAnswer

MathNerd I think that is incorrect. You could choose the 2 people that each of differnt foods in 4C2 which is 6 so it is 6 * 1/81 = 6/81 = 2/27

5C2/10C2 = 10/45 = 2/9

3292822-2500000 = 792822<<<------Answer

In all cases, at least half of John's kids will be boys or at least half will be girls. Furthermore, since John has an odd number of children, these conditions are mutually exclusive--that is, they are never true at the same time. Since a boy is equally likely to be born as is a girl, our answer is therefore 1/2.

true

X-int is when y = 0

0 = -2x - 3

3 = -2x

x = -3/2

y - int is when x = 0

y = -3

(x-int)x = -3/2 and (y - int)y = -3

55. What is the median and mode?

Reorginize them:

20, 32, 32, 45, 45, 45, 48, 50, 55, 70

In the middle we find 45 and 45. Since there is two numbers we take the average. (45 + 45)/2 is 45.

The median is 45

The mode is the number that occurs the most. If you look, 45 is the only number that appear the most, 3 times.

The mode is 45.

x = 5/2

x = 2.5

2/11m + 16 = 4 + 6/11m

12 = 4/11m

m = 33

Well lets see:

6+ 4/5b = 9/10b

6 = 1/10b

b = 60

Sorry but you are incorrect. Where did u go wrong??

From My other post

Well lets see:

6+ 4/5b = 9/10b

6 = 1/10b

b = 60

Sorry but you are incorrect. Where did u go wrong??

Thanks CPhill!!! Tiring.....!!!

3/4n - 18 = 1/4n - 4

1/2n = 14

n = 28

-3 = -7/8 + b<--------Add 7/8 to both side

-17/8 = b

b = -17/8 OR -2.125

Substitution:

Change second equation to point slope:

y=-3x-13

9x-2y=27<---Second Eq.

2y = 9x - 27

y = (9x - 27)/2

y=-3x - 13

Since they both equal y, you can set them equal to each other.

(9x - 27)/2 = -3x - 13 -------------Multiply both sides by 2

9x - 27 = -6x - 26

15x = 1

x = 1/15

Now plug this into either of the equations to get y. I will do the first one

y = -3x - 13 ---------Plug in 1/15 for x

y = -3/15 -13

y = -1/5 - 13

y = -13 1/5

y = -66/5 OR -13.2

x = 1/15 OR 0.06666666666666666666666666666666666666666666666666666667

Elimination Method-->

Set first equation to standard form. 

y = -3x - 13<--------First Equation

9x - 2y = 27

y = -3x - 13

y + 3x = -13<-------------Standard form

-2y + 9x = 27<------------Flipped x and y on the left side. Doesn't change the original equation

Now multiply the top equation by 2

2(y + 3x) = 2 * -13

2y + 6x = -26

-2y + 9x = 27

Now add both equations. This eliminates y so now you can solve for x.

2y + 6x -2y + 9x = -26 + 27

15x = 1

x = 1/15

Now you just do the stuff we did for substitution and solve for y.

y = -3x - 13 ---------Plug in 1/15 for x

y = -3/15 -13

y = -1/5 - 13

y = -13 1/5

y = -66/5 OR -13.2<-----------------------------------------------------------------------------------------Answer for y

x = 1/15 OR 0.06666666666666666666666666666666666666666666666666666667<-----Answer for x