How do you estimate an irrational number?why might you need to estimate an irrational number?

Mathematics

1 answer:

Kazeer [188]3 years ago

7 0

Help me and ill help u

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{2x+5y=26} {3x+4y=26}

NeTakaya

2x + 5y = 26....multiply by 3
3x + 4y = 26...multiply by -2
------------------
6x + 15y = 78 (result of multiplying by 3)
-6x - 8y = - 52 (result of multiplying by -2)
-----------------add
7y = 26
y = 26/7 (or 3 5/7)

2x + 5y = 26
2x + 5(26/7) = 26
2x + 130/7 = 26
2x = 26 - 130/7
2x = 182/7 - 130/7
2x = 52/7
x = 52/7 * 1/2
x = 52/14 which reduces to 26/7 (or 1 5/7)

solution is : (26/7, 26/7)

4 0

3 years ago

Find the derivative of f(x) = -2x2 + 11x at x = 9.

zavuch27 [327]

$\bf f(x)=-2x^2+11x\qquad\qquad \lim\limits_{h\to 0}\ \cfrac{f(x+h)-f(x)}{h}\\\\
-----------------------------\\\\
\cfrac{[-2(\underline{x+h})^2+11(\underline{x+h})]\quad -\quad [-2x^2+11x]}{h}
\\\\\\
\cfrac{[-2(x^2+2xh+h^2)+11x+11h]\quad -\quad [-2x^2+11x]}{h}
\\\\\\
\cfrac{\underline{-2x^2}-4xh-2h^2\underline{+11x}+11h\quad \underline{+2x^2}\underline{-11x}}{h}$

$\bf \cfrac{-4xh-2h^2+11h}{h}\implies \cfrac{\underline{h}(-4x-2h+11)}{\underline{h}}
\\\\\\
\lim\limits_{h\to 0}\ -4x-2h+11\implies -4x-2(0)+11
\\\\\\
\left. -4x+11\cfrac{}{} \right|_{x=9}\implies -4(9)+11$

6 0

4 years ago

What is the diameter of the circle? Enter your answer in the box. _____units

wel

Answer:

8 units because the diameter is the side to side length of the circle so when you count it you get 8 units.

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