There are three consecutive numbers such that twice the first is 20 more than the second.find the numbers? Show your solution.

Mathematics

1 answer:

xxTIMURxx [149]2 years ago

8 0

Answering from phone so this will be a bit messy. a b=a+1 c=b+1=a+2 2a=b+20 Therefore: 2a=a+1+20 a=21,b=22,c=23

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A bowl contains 7 pennies, 9 nickels, and 4 dimes. Elyse removes one coin at random from the bowl and does not replace it. She t

Vlad [161]

Answer:

The probability is 3/95

Step-by-step explanation:

Okay this is a probability without replacement question.

Firstly we calculate the total number of coins = 7 + 9 + 4 = 20 coins

The probability that the first coin will be a dimes = number of dimes/total number of coins = 4/20 = 1/5

Now she removes a coin without replacement, if it was a dime, total number of coins becomes 19 and the total number of dimes becomes 3; Thus the probability of the second coins being a dimes = 3/19

Thus, the probability of both coins being dimes = probability of first coin being dimes * probability of second coins being dimes

= 1/5 * 3/19 = 3/95

6 0

2 years ago

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Ne4ueva [31]

The percentage by which the cost is increasing will be 75%.

<h3>What is the percentage?</h3>

The quantity of anything is stated as though it were a fraction of a hundred. A fraction of 100 can be used to express the ratio.

The percentage of the 8th graders who want to go to the water slides is found from;

In the year 2000, a house was valued at $60 000.

In 2010, the same house was valued at $80 000.

The percentage value is found as;

$\% = \frac{60000}{80000} \times 100 \\\\ \% =75 \%$