A two-digit number is twice the sum of its digit. If the tens digit is 7 less than the unit digit, find the number.
Let x= the unit digit
Then y= the tens digit
<span>And 10y+x= the number
</span>x+y= the sum of the digits
<span>Now we are told that 10y+x=2(x+y) ------1st equation </span>
<span>We are also told that y=x-7 ----------- 2nd Equation </span>
<span>So our equations to solve are: </span>
(1) 10y+x=2(x+y)
<span>(2) y=x-7
</span>
Hope it helps
Answer:
<em>24000 and 1620 for the first and fifth </em>
Step-by-step explanation:
- <em>24 x 25 x 40 = 24000</em>
- <em>9 x 6 x 30 = 1620</em>
<em></em>
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<em></em>
- <em>I only know one and five </em>
- <em>i couldn't figure out the others</em>
- <em>Hope this helps</em>
- <em>The other three i didn't learn yet</em>
- <em>Brainliest</em>
- <em>Ask questions if wrong</em>
Answer:
Combinations:
A committee consisting of three members with the same role
Selecting two sandwiches from a menu of 10
Step-by-step explanation:
A combination is a selection of items from a collection, such that the order of selection does not matter.
A permutation is a selection of items from a collection, such that the order of selection matters.
A. The PIN for a bank or credit card - order matters → permutation
B. A committee consisting of three members with the same role - order does not matter → combination
C. A committee consisting of a president, vice president, and secretary - order matters → permutation
D. Final standings in a professional sports league - order matters → permutation
E. Selecting two sandwiches from a menu of 10 - order does not matter → combination
The probability that Jeremy randomly selected a round tile and a square tile from the sets is given as 1/40 (Option D).
<h3>
What is probability?</h3>
Probability in mathematics is the branch of maths that speaks to the likelihood of an event occurring. Probability is usually given or described to occur between 0 and 1.
1 is the likelihood that the event will occur while zero is the certainty that an event will NOT occur.
Taken in decimal form, the likelihood of the above event occurring will very slim, because, 1/40 = 0.025
Learn more about Probability at:
brainly.com/question/24756209
