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3 years ago

Pleaseeeeeeeeeeeeee !!

Mathematics

1 answer:

8_murik_8 [283]3 years ago

3 0

Answer:

Step-by-step explanation:

all angels equal 180 so add the two you have then subtract 180 with the answer you got

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the distance between two towns is 75 km. the distance between two towns on a map is i.5 cm. what is the scale on the map?

Temka [501]

Easy 75km / 5 cm = 15km:1 cm
hope this helps....

5 0

3 years ago

Read 2 more answers

A piece of wire of length 5050 is cut, and the resulting two pieces are formed to make a circle and a square. Where should the

algol [13]

Answer:

x should be cut at 2221.5 to minimize the total combined area, and at 5050 to maximize it.

Step-by-step explanation:

Let x be the length of wire that is cut to form a circle within the 5050 wire, so 5050 - x would be the length to form a square.

A circle with perimeter of x would have a radius of x/(2π), and its area would be

$A_c = \pir^2 = \pi (\frac{x}{2pi})^2 = \frac{x^2}{4\pi}$

A square with perimeter of 5050 - x would have side length of (5050 - x)/4, and its area would be

$A_s = (\frac{5050 - x}{4})^2 = \frac{(5050 - x)^2}{16}$

The total combined area of the square and circles is

$\sum A = A_c + A_s = \frac{x^2}{4\pi} + \frac{(5050 - x)^2}{16}$

To find the maximum and minimum of this, we just take the 1st derivative, and set it to 0

$A' = \frac{2x}{4\pi} + \frac{-2(5050-x)}{16} = 0$

$\frac{x}{2\pi} - \frac{5050 - x}{8} = 0$

Multiple both sides by 8π and we have

$4x - 5050\pi + x\pi = 0$

$x(4 + \pi) = 5050\pi$

$x = \frac{5050\pi}{4 + \pi} = 2221.5$

At x = 2221.5:

$A = \frac{x^2}{4\pi} + \frac{(5050 - x)^2}{16}$ = 392720 + 500026 = 892746 [/tex]

At x = 0, $A = 5050^2/16 = 1593906$

At x = 5050, $A = \frac{5050^2}{4\pi} = 2029424$

As 892746 < 1593906 < 2029424, x should be cut at 2221.5 to minimize the total combined area, and at 5050 to maximize it.

3 0

3 years ago

The equation x^3-6x=72 has a solution between 4 and 5. Use a trial and improvement method to find this solution. Give your answe

Slav-nsk [51]

Answer:

4.6

Step-by-step explanation:

x³-6x=72

x³-6x-72=0 .... a solution between 4 and 5

x=4 x³-6x-72= 64-24-72 = -32

x=5 x³-6x-72= 125-30-72 = 23

we have to find an x value that makes x³-6x-72 --> 0

see the attachment, we can find the 0 value of x is between 4.63 and 4.64

‘to 1 decimal place’ of the solution is: 4.6 (4.63 is too small and 4.64 is too big)

6 0

3 years ago

Write the scientific notation in numerals. 6.4 x 107

bezimeni [28]

Hey!

-------------------------------------------------

Writing scientific notation in numeral is solving for the equation.

Multiply 10 to 6.4 seven times.

6.4 x 10 = 64

64 x 10 = 640

640 x 10 = 6,400

6,400 x 10 = 64,000

64,000 x 10 = 640,000

640,000 x 10 = 6,400,000

6,400,000 x 10 = 64,000,000

-------------------------------------------------

Hope This Helped! Good Luck!

3 0

4 years ago

This is the problem Dan says 3/5 Is the same as 3.5. Is he correct? Explain

lesya692 [45]

Answer:

He is not correct

Explanation:

The first number is $\frac{3}{5}$

We can note that the numerator is less than the denominator. This means that the given fraction is less than 1

In decimal form, $\frac{3}{5}$ is equal to 0.6

The second number is 3.5

We can note that this number is greater than 1.

This means that the two numbers are not equal

Hope this helps :)

4 0

3 years ago

Read 2 more answers