2 years ago

How to solve for x where (2^x)*x =n?

1 answer:

4 0

Tough call.
You may have to use Newton's Method or something like that.
Graph y=2^x and then graph n/x on the same set of axes. You may have to assign some arbitrary value to n to make this work. From the graph you can read off the approximate coordinates of the point of intersection.

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mestny [16]

Answer:

12 Units

A total of 12 units have been traveled.

6 0

2 years ago

A race car driver’s time in seconds to complete 12 laps is plotted on the graph. Why does the graph begin at x= 1?

Tcecarenko [31]

Because the y value is the time it takes to complete 1 lap.

7 0

3 years ago

Kala purchased a prepaid phone card for $15. Long distance calls cost $12 a minute using this card. Kala Use her card only once

irina [24]

Kala call lasted for 0.36 minutes

<em><u>Solution:</u></em>

Given that Kala purchased a prepaid phone card for $15

Long distance calls cost $12 a minute using this card.

If the remaining credit on her card is $10.68

To find: Number of minutes her call lasted

Let "x" be the number of minutes her call lasted

Cost of 1 minute = $ 12

Total balance = $15

Remaining balance = $ 10.68

So we can frame a equation as:

Total balance = Remaining balance + Cost of 1 minute x number of minutes her call lasted

$15 = 10.68 + 12 \times x\\\\15 - 10.68 = 12x\\\\4.32 = 12x\\\\x = 0.36$

So her call lasted for 0.36 minutes

4 0

2 years ago

Find the perimeter of the regular polygon 7x+4 5(x + 2) - 1

Marina CMI [18]

Answer:

x= 3/7 i.d.k if this is correct I did it in my brain

7 0

2 years ago

Evaluate 8(7x--3) when x=9

Schach [20]

I will assume that by "Evaluate 8(7x--3) when x=9" you meant:

"Evaluate 8(7x-3) when x=9."

First, substitute 9 for x in 7x-3: 7(9)-3 = 60. Rewrite the problem as:

8(60). Multiply. Answer: 480

5 0

2 years ago