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marissa [1.9K]
2 years ago
11

The area of the circle is 1384.74 units squared. What is the surcumfrence of the circle

Mathematics
1 answer:
kirill115 [55]2 years ago
7 0

Answer:

131.88 units

Step-by-step explanation:

Area of the circle = πr^{2} = 1384.74 sq. units

       r^{2} = \frac{1384.74}{3.14} = 441 = 21^{2}

   r  = 21 units

Circumference of circle = 2πr  = 2*3.14*21 = 131.88 units

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If four times a number, added to 3 is divided by the number plus 2, the result is seven halves. Find the number.
dmitriy555 [2]

Answer:

X=-8

Step-by-step explanation:

A number x is multiplied by 4, added to 3, and then divided by x+2, leaving us with 7/2. Or, as an equation:

\frac{4x + 3}{x + 2}  =  \frac{7}{2}

Now, let's cross multiply:

2(4x + 3) = 7(x + 2)

8x + 6 = 7x + 14

And solve:

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1 year ago
1.682 inches rounded to the nearest whole number is 1 inches?
joja [24]

It's closer to 2, so it would be rounded from 1.682 in to 2 in.

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By factorising the expression 3x² + 26x + 51, find two factors of 32 651​
Korolek [52]

The two factors of 32651 are 103 and 317

Explanation:

The given expression is 3x^{2} +26x+51

We need to factor the expression and using the factor we need to determine the two factors of 32651

Let us first determine the factor of the expression 3x^{2} +26x+51

Let us break the expression into two groups.

\left(3 x^{2}+9 x\right)+(17 x+51)

Let us factor out 3x and 17x, we get,

3 x(x+3)+17 (x+3)

Simplifying, we get,

(x+3)(3 x+17)

Thus, the factors of the expression is (x+3)(3 x+17)

Now, we shall determine the factor of 32651

3x^2 + 26x + 51 = 32651

Subtracting both sides by 51, we get,

3x^2 + 26x = 32600

Rewriting the above expression, we get,

3x^2 + 26x = 30000 + 2600

3x^{2} +26x= 3(100^2) + 26(100)

Thus, the value of x is 100

Substituting the value of x in the factor (x+3)(3 x+17), we get,

(100+3)(3(100)+17)=103\times317=32651

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Answer:

Step-by-step explanation:

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It says to find the value of X, having a hard time understanding how to do this one.
andreyandreev [35.5K]

Answer:

First Area of the triangle=180 Degree

I,e ∠A+∠B+∠C=180°

Given ∠A= 21

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x°= 180-55

x= 125°

Step-by-step explanation:


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