<span>These ones are correct:
Multiply the value of the first variable by one of the original equations to solve for the second variable.
</span><span>Solve for one of the variables
</span><span>Substitute the value of the known variable into one of the original equations to solve for the unknown variable.</span>
ACB is 12 cm, so A to b is half of 12, so the total would be 6 cm (or units)
Answer:

Step-by-step explanation:
Given that the bag contains black and red marbles.
Number of black marbles in the bag = 2
Number of red marbles in the bag = 3
Total number of marbles in the bag = Number of black marbles + Number of red marbles = 2 + 3 = 5
Let us have a look at the formula for probability of an event E, which can be observed as:


Now, the marble chosen at first is replaced.
Therefore, the count remains the same.

Now, the <em>required probability</em> can be found as:
