80
The question implies that you're counting by tens & the number comes after 70 and before 90. This is the only number that fits this description.
<h3><u>Given :- </u></h3>
![A=\left[\begin{array}{ccc}1&4\\5&6\\\end{array}\right]](https://tex.z-dn.net/?f=A%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%264%5C%5C5%266%5C%5C%5Cend%7Barray%7D%5Cright%5D)
- a
= 6
<h3><u>To Find :- </u></h3>
<h3><u>Solution:- </u></h3>
In a matrix the the the position of an element is determined by using a where i the number of row and j is number of column in which the element is.
Since 6 is in 2nd column and 2nd row <u>,</u> it's position can be written as a
<u>Comparing with</u> a
Answer:
and 20.5x
and 6.2y
Step-by-step explanation:
-3-x/5+6.2y+20.5x-3/8y
We are given an expression with 5 terms
The terms that has same variables with same exponent are like terms. WE combine only like terms. Constants are also like terms.
In the given expression , the fractions and 20.5x have same 'x' . so they are like terms. we can combine these terms.
the fractions and 6.2y have same 'y' . so they are like terms. we can combine these terms.
your answer would be
6 ways for 1st place
5 ways for 2nd place
4 ways for 3rd place
3 ways for fourth place
and in total there are 360 ways in total.
(6*5*4*3=360)
