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liberstina [14]
3 years ago
7

Kayla has a bowl of beads that contains 42 yellow beads, 28 green beads, 12 white beads, and 18 red beads. She randomly draws a

bead from the bowl.
The probability of Kayla not drawing a yellow or a green bead is
%. The probability of Kayla drawing a red or a green bead is
%
Mathematics
1 answer:
Ede4ka [16]3 years ago
5 0
Add all bead colors up

42+28+12+18=100

add up yellow and green

42+28=70

now find out how many beads are not yellow or green by subtracting that from 100

100-70=30

so the first answer is 30/100 -> 3/10 -> 30%

now add up red and green beads

28+18=46

so your next answer is

46/100 -> 23/50 -> 46%
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(3x^2y)(7x^2y)(-2x^2y)
Anuta_ua [19.1K]
(3x^2y)(7x^2y)(-2x^2y)=\\ \\=3\cdot 7\cdot (-2)\cdot x^2\cdot x^2\cdot x^2 \cdot y \cdot y \cdot y=\\ \\= -42\cdot x^{2+2+2}\cdot y^{1+1+1}=\\ \\=-42x^6y^3


3 0
3 years ago
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Professor Melendez has 10 students in her college
frez [133]

Answer:

Mean = 18.625

Median = 18.5

Step-by-step explanation:

Given the following :

Age = 19, 27, 19, 18, 18, 18, 47, 19, 20, 18

The mean Age :

Mean = Σ(x) ÷ N

N = number of data

(19 + 27 + 19 + 18 + 18 + 18 + 47 + 19 +20 + 18) / 10

Σ(x) / N = 223/10 = 22.3

Rearranging to get the median:

18,18,18,18,19,19,19,20,27,47

Middle value = median ( 19 + 19)/2 = 19

The outliers in the data are:

18,18,18,18,19,19,19,20,27,47

OUTLIERS ARE VALUES

< Q1 - (1.5 × IQR)

> Q3 + (1.5 × IQR)

IQR = Q3 - Q1 (Interquartile range)

Q3 = upper quartile

Q1 = lower quartile

From the data :

Q3 = 20, Q1 = 18

IQR = Q3 - Q1 = 20 - 18 = 2

< 18 - (1.5 × 2) ; <15

> 20 + (1.5 × 2) ; >23

VAlues greater than 23 and less than 15 are outliers in the data

27 and 47

After removing outliers

N = 10 - 2 = 8

Σ(x) = 223 - (47+27) = 149

Mean = 149/8 = 18.625

X = 18,18,18,18,19,19,19,20

Median = (18 + 19)/2 = 18.5

3 0
3 years ago
Suppose a laboratory has a 30 g sample of polonium-210. The half-life of polonium-210 is about 138 days How many half-lives of p
steposvetlana [31]
This is an easy half-life calculation because it involves an exact integer of half-lives.  1,104 days is precisely 8 half-lives.  After each half-life, one half of the original remains.
So, after 8 half-lives you will have 1 / 2^8 of the original material left.
So we start with 30 grams and 1 / 2^8 = <span> <span> <span> 0.00390625</span></span></span>.
We are therefore left with (30 * <span> <span> <span> 0.00390625) or </span></span></span> <span> <span> <span> 0.1171875 grams of the original 30 grams of polonium.   </span> </span> </span>


5 0
3 years ago
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Cameron is playing 9 holes of golf. He needs a total of at most 15 over par on the last four holes to beat his best golf score.
Margaret [11]

Cameron is successful at beating his record since he only shot 9 over par on the last 4 holes.

To find this, first turn each score into a number. Over pars are positive and under pars are negative. This gives us the following expression.

+5 - 1 + 6 - 1 = + 9

Therefore, he stayed below the + 15 that he needed.

8 0
3 years ago
Find the slope of the line through the points (12, -9) &amp; (-11, -9)
marin [14]

Answer:

0

Step-by-step explanation:

7 0
3 years ago
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