Answer:
36
Step-by-step explanation:
1 kg = 1 * 10 ^ 3 g
kilo = 10^3
For the matrix given , the element a₂₃ is the number at 2nd row and 3 column ,which is 6 , Option B is the correct answer.
<h3>What is a Matrix ?</h3>
It is a table or a rectangular array of numbers or expressions arranged in rows and columns ,
For a Matrix of m x n , m is the no. of rows and n is the no. of column
For the matrix given the element a₂₃ is the number at 2nd row and 3 column ,
which is 6 ,
Therefore Option B is the correct answer.
To know more about Matrix
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Answer:
The speed Alex was going first was 16 mph
Step-by-step explanation:
The distance Alex was walking = 48 mile
The speed with which Alex was walking for the first half of the time = 2 × The speed Alex was walking for the second half of the time
The total time Alex spends on the road = 4 hours
Let x represent the speed with which Alex was walking in miles per hour, (mph), the first half of the time
Therefore, we have;
x × 2 + x/2 × 2 = 48
3·x = 48
∴ x = 48/3 = 16
Therefore, the speed with which Alex was walking in miles per hour, (mph), the first half of the time = x = 16 mph
Alex was going at 16 miles per hour (mph) first.
