A group orders 3 large veggie pizzas. Each slice represents 1/8 of the entire pizza. The group eats 3/4 of the pizza. How many s
1 answer:
You might be interested in
Answer:
Kylie's grandfather is 73 years old.
Step-by-step explanation:
Let the first digit in Kylie's grandfather's age be x, which is the age of Isaac
Let the second digit in Kylie's grandfather's age be y, which is the age of Kendra.
Therefore from the given information we can say that
(10x + y) + x + y = 83
therefore 11x + 2y = 83
Let us take x = 7 then we get 77 + 2y = 83 y = 3
Therefore we can say Issac's age is 7
and Kendra's age is 3
and the age of Kylie's grandfather is 73.
There are 21 ways Tim choose 2 books from the 7 recommended book
<em><u>Solution:</u></em>
Given that Tim must read 2 books from a list of 7 recommended books for his summer reading program
To find: different ways can Tim choose 2 books from the 7 recommended books
This is a combination problem
A combination is a selection of all or part of a set of objects, without regard to the order in which objects are selected
<em><u>The formula for combinations is:</u></em>
where n represents the number of items, and r represents the number of items being chosen at a time
Here we have to choose 2 books from 7 books
Therefore, n = 7 and r = 2
<em><u>Substituting values in above formula, we get</u></em>
For a number n, the factorial of n can be written as,
Therefore, we get
Thus there are 21 ways Tim choose 2 books from the 7 recommended book