Answer:
6
Step-by-step explanation:
2/7 times 21 equals 6. Next time, don't ask as a brainly question and use calculator so you don't waste/lose your points.
Hope this helps!!! PLZ MARK BRAINLIEST!!!
Answer:

Step-by-step explanation:
2x + 1 - 4x = 7x +5
First, take 7x to the left side.
2x + 1 - 4x - 7x = 5
Now take 1 to the right side.
2x - 4x - 7x = 5 - 1
Now combine like terms.
-2x - 7x = 4
-9x = 4
Now divide both sides by -9.
<u>x = - 4/9</u>
Answer:63 dollars 16.80÷ 4 = 4.20 4.20 × 15 = 63
Step-by-step explanation:
Answer:
The probability that A occurs given that B occurred is 333/400, that is, 83.25%.
Step-by-step explanation:
Since in an experiment, the probability that event A occurs is 6/7, the probability that event B occurs is 4/5, and the probability that event A and B both occur is 2/3, to determine what is the probability that A occurs given that B occurs the following calculation must be performed:
4/5 = 0.8
2/3 = 0.666
0.8 x X = 0.666
X = 0.666 / 0.8
X = 0.8325
0.8325 = 333/400
Therefore, the probability that A occurs given that B occurred is 333/400, that is, 83.25%.