Water is leaking out of an inverted conical tank at a rate of 12,500 cm3/min at the same time that water is being pumped into th
1 answer:
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It's a combination:
Answer:
11
Step-by-step explanation:
The mean is calculated as
mean =
let the third number be x , then
= 15 ( multiply both sides by 3 to clear the fraction )
34 + x = 45 ( subtract 34 from both sides )
x = 11 ← third number
