3 years ago

Solve: 7 - 2x = 2(x-4) - 1

Mathematics

1 answer:

vagabundo [1.1K]3 years ago

8 0

Answer = C. X= 4
Isolate the variable by dividing each side by factors that don't contain the variable.

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Rationalize the denominator of square root of negative 49 over open parentheses 7 minus 2 i close parentheses minus open parenth

Olegator [25]

sqrt(-49) / [ (7-2i) - (4+9i) ]

= 7i / (3 - 11i)

= 7i (3+11i) / [ (3 - 11i) (3 + 11i) ]

= (21 i - 77) / (9 + 121) = choice (d), (-77 + 21i) / 130

6 0

3 years ago

Use the Intermediate Value Theorem to show that there is a root of the given equation in the specified interval. ex = 3 − 2x, (0

raketka [301]

Answer:

$f(0)=-2\\f(1)=e-1$

Step-by-step explanation:

According to intermediate value theorem, if a function is continuous on an interval $[a,b]$ , and if $k$ is any number between $f(a)$ and $f(b)$ , then there exists a value, $x=m$ , where $a$ , such that $f(m)=k$

In the given question,

Intermediate Value Theorem is used to show that there is a root of the given equation in the specified interval.

Here,

$f(x)=e^x-3+2x$

Put $x=0$

$f(0)=e^0-3+2(0)=1-3+0=-2$

Put $x=1$

$f(1)=e^1-3+2(1)=e-3+2=e-1$

3 0

3 years ago

Be my friend with your Taurus or Leo.<br><br> I love Tauars and leos!<br><br> I'm a Pisces btw

barxatty [35]

Answer:

Well, I'm a Scorpio... why does the sign matter to you?

6 0

3 years ago

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At a museum you can see the four cable lines that are used to pull cable cars up and down a hill. Each cable travels at a speed

borishaifa [10]

Answer:

54.514 rev/min

Step-by-step explanation:

Data provided in the question:

Speed of the cable car = 12.65 miles per hour

Diameter of the rotating wheel, d = 6.5 feet

Now,

The speed of rotation of the wheel will be equal to the speed of the cable car

thus,

The speed of rotation of the wheel = 12.65 miles per hour

also,

1 miles = 5280 feets

1 hour = 60 minutes

Thus,

The speed of rotation of the wheel = $\frac{12.65\times5280}{60}$

= 1113.2 ft/ min

Circumference of the wheel = πd

= 6.5π feet

= 20.42 feet

Therefore,

The speed of rotation of the wheel in revolutions per minute

= 1113.2 ÷ 20.42 rev/min

= 54.514 rev/min

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4 years ago

For 20 points

ddd [48]

Answer:

Step-by-step explanation:

8 0

3 years ago

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