Answer:
Option A is correct.
Step-by-step explanation:
We need to find the difference of two matrices.
The matrices are:
![\left[\begin{array}{cc}-4&8\\3&12\end{array}\right] - \left[\begin{array}{cc}2&1\\-14&15\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D-4%268%5C%5C3%2612%5Cend%7Barray%7D%5Cright%5D%20-%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D2%261%5C%5C-14%2615%5Cend%7Barray%7D%5Cright%5D)
We will subtract each row entry of Matrix 1 from the corresponding row entry of Matrix 2.
![\left[\begin{array}{cc}-4-2&8-1\\3+14&12-15\end{array}\right]\\\left[\begin{array}{cc}-6&7\\17&-3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D-4-2%268-1%5C%5C3%2B14%2612-15%5Cend%7Barray%7D%5Cright%5D%5C%5C%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D-6%267%5C%5C17%26-3%5Cend%7Barray%7D%5Cright%5D)
So, We get the answer
![\left[\begin{array}{cc}-6&7\\17&-3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D-6%267%5C%5C17%26-3%5Cend%7Barray%7D%5Cright%5D)
which matches Option A.
So, Option A is correct.
Seems like I've done a few of these already today.
1.
a[1] = 4, d=6
Formula: a[n] = 4 + 6(n-1)
a[40]=4 + 6(39) = 238
Table: 4 10 16 22 28 34 ... a[40]=238
--------
2.
a[23]=25, d=3
a[n] = a[1] + d(n-1)
25=a[23]=a[1] + 3(22)
a[1] = 25 - 66 = -41
Table: -41 -38 -35 -32 -29 -26
Let's check a[23]= -41 + 3(22)= 25, good
Formula: a[n] = -41 + 3(n-1)
Answer:
W = 55T
Step-by-step explanation:
He types 110 / 2 = 55 words every minute. Thus, W = 55T
Hi one
22
2
59
3
23
4
55
brainlist plz
