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s344n2d4d5 [400]
3 years ago
13

What type of sequence is this? arithmetic, geometric, neither, or both?

Mathematics
1 answer:
Yakvenalex [24]3 years ago
7 0
Arithmetic
-2 +2= 2 +2= 4 +2= 6 ...
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What is the value of x when x/6 = 198?
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Should be 1,188 , because 1,188 divided by six would be 198, hope I could help
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You roll a red die and a green die. What is the size of the sample space of all possible outcomes of rolling these two dice, giv
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If (x+4)*2=49 and x<0, what is the value of x
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8. The speed of the current in a river is 6 mph. A ferry operator who works that part of the river is looking to buy a new boat
Natali [406]
Answer: the speed of the boat on the lake is 9 mph
Step-by-step explanation:
Let x represent the speed of the boat on the lake or in still water.
The speed of the current in a river is 6 mph. This means that if the boat goes upstream against the speed of the current, its total speed would be (x - 6)mph. If the boat goes downstream against the speed of the current, its total speed would be (x + 6)mph.
Time = distance/ speed
Every day, his route takes him 22.5 miles each way against the current and back to his dock, and he needs to make this trip in a total of 9 hours. This means that the time taken to travel upstream is
22.5/(x - 6). The time taken to travel downstream is
22.5/(x + 6)
Since the total time is 9 hours, it means that
22.5/(x - 6) = 22.5/(x + 6)
Cross multiplying, it becomes
22.5(x + 6) + 22.5(x - 6) = 9
Multiplying through by (x + 6)(x - 6), it becomes
22.5(x - 6) + 22.5(x + 6) = 9[(x + 6)(x - 6)]
22.5x - 135 + 22.5x + 135 = 9(x² - 6x + 6x - 36)
22.5x + 22.5x = 9x² - 324
9x² - 45x - 324 = 0
Dividing through by 9, it becomes
x² - 5x - 36 = 0
x² + 4x - 9x - 36 = 0
x(x + 4) - 9(x + 4) = 0
x - 9 = 0 or x + 4 = 0
x = 9 or x = - 4
Since the speed cannot be negative, then x = 9
3 0
2 years ago
Read 2 more answers
How many whole numbers lie between √ 8 and √ 80​
WARRIOR [948]

Answer:

There are 5 whole numbers.

Step-by-step explanation:

3,4,5,6,7

7 0
3 years ago
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