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murzikaleks [220]
3 years ago
13

a jar contains 30 red, 40 blue, and 50 white buttons. you pick one button at random, find the probability that it is red or blue

Mathematics
2 answers:
abruzzese [7]3 years ago
5 0

Answer:

0.58 rounded to the nearest hundredths

Step-by-step explanation:

30+40+50=120

now add red+blue

30+40=70

70/120

pls mark me brainliest

Afina-wow [57]3 years ago
4 0

Answer: 25/120

Step-by-step explanation: if you do a proportion with x over 100 alongside 30 over the total 120 then solve. (30 times 100 divided by 120 to solve for x) you get 25!

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Anybody can help me on this
Maslowich

Answer:

y= -1,800x+39,000

2. 39,000

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
A gambler playing blackjack in a casino using four decks noticed that 20% of the cards that had been dealt were jacks, queens, k
Ksenya-84 [330]

Answer:

x = 162 cards need to be dealt with

Step-by-step explanation:

Given:

- Estimation of likelyhood of next card to be queen, a king, or an ace:

                                  ( 64 - 0.2*x ) / ( 208 - x )

Find:

For what values of x is this likelihood greater than 70%?

Solution:

- Use the likely-hood estimation relation and set up the inequality as follows:

                                 ( 64 - 0.2*x ) / ( 208 - x ) > 0.7

                                 ( 64 - 0.2*x ) > 0.7*( 208 - x )

                                   64 - 0.2*x > 145.6 - 0.7*x

                                          0.5*x > 81.6

                                                 x > 163.2

- It would require 162 cards to be dealt with for the probability of next card being queen, a king, or an ace is greater than 70%

6 0
3 years ago
How many 1/20 in 7/8
MariettaO [177]

Answer:

17.5

Step-by-step explanation:

when you divide the two together you get 17.five

7 0
3 years ago
What is the slope of the line on the graph?
erma4kov [3.2K]

Answer:

m=\frac{1}{2}

Step-by-step explanation:

Slope Formula: m=\frac{y_2-y_1}{x_2-x_1}

Step 1: Find 2 points

(0, 2) y-int

(-4, 0) x-int

Step 2: Plug into slope formula to find slope <em>m</em>

<em />m=\frac{2-0}{0-(-4)}<em />

<em />m=\frac{2}{0+4}<em />

<em />m=\frac{2}{4}<em />

<em />m=\frac{1}{2}<em />

5 0
3 years ago
Given that x and y vary inversely and that y is 8 when x is 2, what is the value of x when y is 18?
Savatey [412]

Answer:

8/9

Step-by-step explanation:

the equation is x = k / y

when x = 2 & y = 8 then k is 16

when you is 18 then x = 8/9

7 0
3 years ago
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