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2 years ago

PLEASE HELP!! IM ON THE LAST QUESTIONNNN ( 30 points!)

Mathematics

2 answers:

dusya [7]2 years ago

3 0

$~~~~~\pi r^2 = 513\\\\ \implies r = \sqrt{\dfrac{513}{\pi}}\\\\ \implies r= \sqrt{\dfrac{513}{3.14}}\\\\\implies r=12.78~ \text cm.}\\\\\text{Hence the radius is 12.78 cm.}$

deff fn [24]2 years ago

3 0

Answer:

Step-by-step explanation:

Area of circle = πr²

$\sf \boxed{r =\sqrt{ \dfrac{Area}{3.14}}}$

$\sf r =\sqrt{\dfrac{513}{3.14}}\\\\r = \sqrt{163.38}\\\\r = 12.78 \ cm$

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3x+4=-4x-1<br> solve for x

rewona [7]

Answer: x=−5/7

Step 1. Add 4x to both sides of the equation.

3x+4+4x=−4x−1+4x

7x+4=−1

Step 2. Now you subtract 4 from both sides.

7x+4−4=−1−4

7x=−5

Step 3. Then divide both sides by 7.

7x/7=-5/7

Final Answer: x=-5/7

Hope I could help! :)

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3 years ago

Encuentre el radio y el área de círculos cuya circunferencias tienen las siguientes medidas

Vadim26 [7]

Answer:

Los radios de los círculos son $r_{1} \approx 9.995$ , $r_{2} \approx 2.013$ , $r_{3} \approx 7.592$ , respectivamente.

Las áreas de los círculos son $A_{1} \approx 313.845$ , $A_{2} \approx 12.730$ , $A_{3} \approx 181.077$ , respectivamente.

Step-by-step explanation:

La circunferencia ( $s$ ) se calcula mediante la siguiente fórmula:

$s = 2\pi\cdot r$ (1)

Donde $r$ es el radio del círculo.

Una vez hallado el radio, se determina el área de la figura geométrica ( $A$ ) mediante la siguiente fórmula:

$A = \pi\cdot r^{2}$ (2)

Si conocemos que las circunferencias son $s_{1} = 62.8$ , $s_{2} = 12.65$ y $s_{3} = 47.7$ , respectivamente:

1) Radios de los círculos

$r_{1} = \frac{s_{1}}{2\pi}$ , $r_{2} = \frac{s_{2}}{2\pi}$ , $r_{3} = \frac{s_{3}}{2\pi}$

$r_{1} \approx 9.995$ , $r_{2} \approx 2.013$ , $r_{3} \approx 7.592$

2) Áreas de los círculos

$A_{1} = \pi\cdot r_{1}^{2}$ , $A_{2} = \pi\cdot r_{2}^{2}$ , $A_{3} = \pi\cdot r_{3}^{2}$

$A_{1} \approx 313.845$ , $A_{2} \approx 12.730$ , $A_{3} \approx 181.077$

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3 years ago

Tyler evaluates the expression -621,044 - (-214,318) and gets an answer of -400,080.

cupoosta [38]

Answer: shut up nerd you wont report me you goodie toshoos

Step-by-step explanation:

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4 years ago

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attashe74 [19]

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3 years ago

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aleksandrvk [35]

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4 years ago

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