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MariettaO [177]
3 years ago
11

Math hw graded on accuracy pls help!!

Mathematics
1 answer:
lubasha [3.4K]3 years ago
8 0

Answer:

  see below

Step-by-step explanation:

Putting n=1 into the formulas eliminates the first two choices, since they evaluate to 3.57 and 0.85, respectively, not 4.2.

Putting n=2 into the formula eliminates the third choice, because you know that 4.2(0.15) < 3.57 without even using a calculator.

The only viable choice (and the correct choice) is the last one.

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The Blue Ridge Parkway is 469 miles long. The parkway is a road that runs through 29 Virginia and North Carolina counties. Jenny
DedPeter [7]

Answer:

281/2/5 miles

Step-by-step explanation:

469/5 = 93.8

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8 0
3 years ago
The difference of the square of a number and 28 is equal to 3 times that number
Pepsi [2]

Answer:

- 4, 7

Step-by-step explanation:

Let the required number be x.

Therefore, according to the given condition:

{x}^{2}  - 28 = 3x \\  {x}^{2}  - 3x - 28 = 0 \\  {x}^{2}  - 7x + 4x - 28 = 0 \\ x(x - 7) + 4(x - 7) = 0 \\ (x - 7)(x + 4) = 0 \\ x - 7 = 0 \: or \: x + 4 = 0 \\ x = 7 \: or \: x =  - 4 \\

5 0
3 years ago
Find the upper quartile of this data set: 593, 588, 540, 434, 420, 398, 390, 375
ratelena [41]
The answer is D. 564
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4 0
3 years ago
Change 7.5m into mm.<br><br> What’s the answer to this?
liubo4ka [24]
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