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3 years ago

Calcular el área y el perímetro de un círculo que tiene 50 cm de radio

Mathematics

1 answer:

gulaghasi [49]3 years ago

8 0

Answer:

Area: 7850 square cm

Perimeter: 314 cm.

Step-by-step explanation:

The area is $\pi r^{2}$ . With r=50, $\pi 50^{2}$ =2500π which is about (2500)(3.14)=7850.

The perimeter is $2\pi r$ which is the same as (diameter)(π). The diameter is 100, so $100\pi$ which is about (100)(3.14)=314.

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Rectangle has an

liq [111]

The positive value for x is 7

Explanation:

Given that the area of a rectangle is expressed by $2x^2-7x-4$

The area of the rectangle is 45.

We need to determine the positive value for x.

The value for x:

The value of x can be determined by equating both the values of area of a rectangle.

Thus, we have,

$2x^{2} -7x-4=45$

Subtracting both sides by 45, we have;

$2x^{2} -7x-49=0$

Let us solve the equation using the quadratic formula.

Thus, we get;

$x=\frac{-(-7) \pm \sqrt{(-7)^2-4(2)(-49)}}{2(2)}$

Simplifying, we get;

$x=\frac{7 \pm \sqrt{49+392}}{4}$

$x=\frac{7 \pm \sqrt{441}}{4}$

$x=\frac{7 \pm 21}{4}$

Thus, the two values of x are given by

$x=\frac{7 + 21}{4}$ and $x=\frac{7 - 21}{4}$

$x=\frac{28}{4}$ and $x=\frac{-14}{4}$

$x=7$ and $x=-\frac{7}{2}$

Since, x cannot take negative values, then $x=7$

Thus, the value of x is 7.

4 0

3 years ago

Which of the following statements are not true about parallelograms?

Ostrovityanka [42]

9514 1404 393

Answer:

1, 2

Step-by-step explanation:

1. The area of a parallelogram is the product of length and width. The given statement is FALSE.

2. The angles formed by the diagonals are linear pairs, so supplementary. The given statement is FALSE.

3. TRUE

4. TRUE

5. TRUE

Statements 1 and 2 are not true.

3 0

3 years ago

34x−5=4 x = im confused

IRINA_888 [86]

Answer:

9/34

Step-by-step explanation:

Let us move all the numerical values to one side:

34x= 4+5

34x = 9

x=9/34

I hope this helps! :)

8 0

3 years ago

URGENT PLEASE ANSWER WILL MARK BRAINLIEST FOR THE FIRST RIGHT ANSWER

masha68 [24]

Answer:

1) The rate of change is constant ($$ 2) The line passes through the origin (0, 0). 3) The equation of the direct variation is $$ y =1 x or simply $$

7 0

3 years ago

Read 2 more answers

What is the value of x?

Rzqust [24]

Your answer is 2

if you preform the Pythagorean theorem you will know that 10 squared is 100 and 24 squared is 576

5 0

4 years ago