Step-by-step explanation:
The important rule to know is that when adding and subtracting matrices, first make sure the matrices have the same dimensions. In order words, you can add or subtract a 2x3 with a 2x3 or a 3x3 with a 3x3. However, you cannot add a 3x2 with a 2x3 or a 2x2 with a 3x3.
Answer:
1. Correct
2. Incorrect
Step-by-step explanation:
( - 1 + 1 ) / - 1
= 0 / - 1
= 0
- 1 / 1 = - 1
Answer: -6x
Step-by-step explanation:
multiply 2 by 3
Assuming he's going 12 miles per hour, and 10 miles per hour.
Firstly he rode his bike for 2 1/3 hours at 12 miles per hour,
12 miles = 1 hour
24 miles = 2 hours
4 miles = 1/3 hour
He rode 28 miles in the first 2 1/3 hours.
Secondly, he rode his bike at the speed of 10 miles per hour for 1 1/2 hours
10 miles = 1 hour
5 miles = 1/2 hour
He rode his bike for 15 miles for the next 1 1/2 hours, together he rode his bike for 43 miles (28 + 15).
