In a four-digit number, the first digit cannot be 0, so there are only 4 even numbers available. For the second, third, and fourth digits, there are 5 available numbers. Thus, the number of 4-digit numbers containing only even digits is 4 x 5 x 5 x 5 = 500 numbers.
Answer: Option 'c' is correct.
Step-by-step explanation:
Since we have given that
Average number of arrivals = 6 per hour
Service rate = 3 every 15 minutes
Service rate is given by
So, the average number of customers in the system is given by
Hence, Option 'c' is correct.
These are vertical angles, so they are equal in measurements.
First, simplify [2(x + 10)]
Distribute 2 to all terms within the parenthesis
2(x + 10) = 2x + 20
Next, place both expressions equal to each other
2x + 20 = 3x - 30
Solve for x. Isolate the variable. Subtract 3x and 20 from both sides
2x (-3x) + 20 (-20) = 3x (-3x) - 30 (-20)
2x - 3x = -30 - 20
Simplify
-x = -50
Isolate the x. Divide -1 from both sides
-x/-1 = -50/-1
x = 50
50 is your answer for x
hope this helps
