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natima [27]
2 years ago
8

5r+8=2r solve the equation for r

Mathematics
1 answer:
lianna [129]2 years ago
8 0
I think it is −2.666666666666667 but i’m not sure!
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We draw 2 cards from a deck of 52 cards. what is the probability that both are queens?
solniwko [45]
Use combination
There are 4 queen cards in a deck of 52 cards
Probability = 4C2 / 52C2

I calculate 4C2 first
4C2 = 4! / (2! 2!)
4C2 = (4 × 3 × 2 × 1) / (2 × 1 × 2 × 1)
4C2 = 6

Then I calculate 52C2
52C2 = 52! / (50! 2!)
52C2 = (52 × 51)/2
52C2 = 1.326

Hence, the probability is
Probability = 4C2 / 52C2
Probability = 6/1,326
Probability = 1/221
7 0
3 years ago
Completely factor 1-100x^2​
stiv31 [10]

Answer:

Since both terms are perfect squares, factor using the difference of squares formula,  a 2 − b2 = ( a + b ) (a − b )  where  a= 1  and  b = 10 x . ( 1 + 10 x ( 1 − 10 x )

Step-by-step explanation:

4 0
2 years ago
Round your answer to the nearest percent.
emmainna [20.7K]

Answer:

Step-by-step explanation:

Givens

Number not using given app = 71

Total number of students  = 219

% = ?

Solution

P(~given app) = 71 / 219

P(~given app)  = 0.324

% = 0.324 * 100  = 32.4%

Answer

32.4% do not use Given App

4 0
2 years ago
ANYONE PLEASE HELP ME ANSWER THIS QUESTION AND I'LL GIVE THE BRAINLIEST TO SOMEONE.
Roman55 [17]
It will take her 5 months because you do 50divided by 12 because there is 12 months in a year
4 0
2 years ago
A floor lamp originally cost $44.50. Over a period of two months, it underwent the following changes in price. 62% Markup 15% Ma
Luba_88 [7]
We have to find the final price of the floor lamp after all changes in price.
If the price changes 62% Markup we will multiply previous price by 1.62
( 100% + 62% = 162% = 1.62 ). Also for 15% Markdown we will multiply it by 0.85 ( 100% - 15% = 85% = 0.85 ) and so on:
$44.50 * 1.62 * 0.85 * 1.18 * 1.20 * 0.55 = $47.72
Answer:
B. $47.72
3 0
3 years ago
Read 2 more answers
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