Three families each have three sons and no daughters. Assuming boy and girl babies are equally likely, what is the probability of this event?

Answers

Answer 1

Answer:
I don't think it matters how many families are involved.
You're talking nine live births, and the probability of a
male birth each time is 50% .

So the probability of nine males in nine births is

(1/2)^9 = 1/512 = about 0.195 percent (rounded)

Answer 2

Answer: three families with three children all boys
parents-2
children-3
total-5 times 3= 15
then boys-3 times three=9

Answer: 9/12
Percentage:75%

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After school, Marcus can walk 1 mile to the library in about the same time he can bike 2.5 miles to the sporting goods store. His speed on the bike is 6 mi/h faster than his walking speed. what is Marcus' walking speed?

Answers

$d-distance\nt-time\nv-speed$

$d_1=1mile\nd_2=2.5miles\nt_1=t_2\nv_1+6=v_2\n\nv=(d)/(t)\to vt=d\to t=(d)/(v)\n\n(d_1)/(v_1)=(d_2)/(v_2)\n\n(1)/(v_1)=(2.5)/(v_1+6)\n\ncross\ multiply:\n2.5v_1=v_1+6\n2.5v_1-v_1=6\n1.5v_1=6\ \ \ \ \ /:1.5\nv_1=4\n\nAnswer:Marcus'\ walking\ speed\ is\ 4\ mph.$

33 is 50 percent of what number?

Answers

66 is the answer
Just double 33 because 50+50 equals 100
Which means 33+33 equals 66. Which in this case 66 is the 100%

Please help me with my question!!

Answers

Same with the other question we did, we are given the area of each tile which is 4 1/2in^2.

All we need to do it divide.

252 / 4.5 = 56

So, she would need 56 tiles in total.

Best of Luck!

Answer:

56 tiles

Step-by-step explanation:

$(252)/(4(1)/(2))= \n\n\n(252)/((9)/(2))= \n\n\n252* (2)/(9)= \n\n\n\boxed{56}$

Hope this helps!

Plz help!!! I will give brainliest!!! No links!! Also plz explain how you got ur answer!Lainee brought a book to read on the way to California. Once we go to the hotel, she had read 5/6 of it. What fraction of the book does she have left to read?

Answers

1/6th left because she divided her book into 6ths and she red 5/6 and 5-6 is 1 so that means she still has 1/6 of the book to read

Answer:

1/6

Step-by-step explanation:

Because because there are six books in total and she only red 5 in the way

The area of a playground is 216 yd^2. the width of the playground is 6 yd longer than its length find the length and width.A. length=18, width=12
B. length=12, width=18
C. length=18, width=24
D.length=24, width=18

Answers

Answer: B. length=12, width=18

Step-by-step explanation:

Let x = Length of the playground then width = x+6

Area of a rectangular playground = Length x width

Since , area of playground = $216\ yd^2.$

Then , we have

$216=(x)*(x+6)\n\n\Rightarrow\ x^2+6x\n\n\Rightarrow\ x^2+6x-216=0\n\n\Rightarrow\ x^2+18x-12x-216=0\n\n\Rightarrow\ x(x+18)-12(x+18)=0\n\n\Rightarrow\ (x-12)(x+18)=0\n\n\Rightarrow\ x=12\text{ or }x=-18$

But length cannot be negative , so reject x= -18 .

Thus , the length of playground = 12 yd

Then , width = 12+6 = 18 yd

Hence, the correct answer is B. length=12, width=18

Let the length of the playground be x, then the width is 6 + x.
Area = length * width = x * (6 + x) = 6x + x^2 = 216

Solving the quadratic equation x^2 + 6x - 216 = 0, we have x = 12 or -18

i.e length = 12 and width = 6 + 18 = 18

Soooo yea uh i need help :'3
2 1/3 feet :4 1/2 feet
help

Answers

$2 (1)/(3) : 4 (1)/(2) \n = (7)/(3) : (9)/(2) \n = 14:27$

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