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natta225 [31]
2 years ago
10

The diameter of a circle is 6.4 in.

Mathematics
2 answers:
serg [7]2 years ago
6 0

Answer: B.) 32.154 in²

Step-by-step explanation: divide 6.4 by 2 to get the radius then it is 3.2

then the formula to find the area of a circle is Area = πr²

π = 3.14

so... Area= 3.14x3.2²

                = 3.14x10.24

                = 32.1536

then when u estimate the value u get 32.154 in²

DedPeter [7]2 years ago
3 0

Answer:

B. 32.154 in²

Step-by-step explanation:

A= 3.14 * r^2

A= 3.14 * 3.2^2

A= 32.154

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4 years ago
X-y=5 and x^2y=5x+6​
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By applying algebraic handling on the two equations, we find the following three <em>solution</em> pairs: x₁ ≈ 5.693 ,y₁ ≈ 10.693; x₂ ≈ 1.430, y₂ ≈ 6.430; x₃ ≈ - 0.737, y₃ ≈ 4.263.

<h3>How to solve a system of equations</h3>

In this question we have a system formed by a <em>linear</em> equation and a <em>non-linear</em> equation, both with no <em>trascendent</em> elements and whose solution can be found easily by algebraic handling:

x - y = 5      (1)

x² · y = 5 · x + 6       (2)

By (1):

y = x + 5

By substituting on (2):

x² · (x + 5) = 5 · x + 6

x³ + 5 · x² - 5 · x - 6 = 0

(x + 5.693) · (x - 1.430) · (x + 0.737) = 0

There are three solutions: x₁ ≈ 5.693, x₂ ≈ 1.430, x₃ ≈ - 0.737

And the y-values are found by evaluating on (1):

y = x + 5

x₁ ≈ 5.693

y₁ ≈ 10.693

x₂ ≈ 1.430

y₂ ≈ 6.430

x₃ ≈ - 0.737

y₃ ≈ 4.263

By applying algebraic handling on the two equations, we find the following three <em>solution</em> pairs: x₁ ≈ 5.693 ,y₁ ≈ 10.693; x₂ ≈ 1.430, y₂ ≈ 6.430; x₃ ≈ - 0.737, y₃ ≈ 4.263.

To learn more on nonlinear equations: brainly.com/question/20242917

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F(x)= (x+4) ^{2} -13 is the answer
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