Answer:
See below.
Step-by-step explanation:
You take the absolute value of the negative number and add.
For example the difference between - 2 and + 3 is |-2|
= 3 + 2 = 5.
+4 and - 6: we have 4 + |-6| = 10.
Therefore, her rate per hour = $55 per hour plus $248 material charge.
Answer:
A; B; D; F; G
Step-by-step explanation:
Standard form: Ax+By=C
Answer:
P = 0.0909
Step-by-step explanation:
To know the number of ways or combinations in which we can select x elements from a group of n elements, we can use the following equation:
So, if you sat down at your computer and randomly loaded 4 of the 12 problems, there are 495 different possibilities and it is calculated as:
Then, from 495 different possibilities, there are 45 possibilities that both this problem and Richard Rusczyk's problem were among the four you loaded. This 45 possibilities are calculated as:
Because you need to select: this problem and there is only one, the problem that Richard Rusczyk wrote and there is only one, and 2 problems from the other 10.
Finally, the probability that both this problem and Richard Rusczyk's problem were among the four you loaded is equal to: