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3 years ago

Please help

Mathematics

1 answer:

andrezito [222]3 years ago

3 0

$f(x)=\dfrac{4}{5}x-2\\\\\\f(3)=\dfrac{4}{5}\cdot3-2=\dfrac{12}{5}-2=\dfrac{12}{5}-\dfrac{10}{5}=\boxed{\frac{2}{5}}$

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denis23 [38]

Answer:

x = 14

Step-by-step explanation:

4x° + (3x + 20)° + (3x + 20)° = 180° (sum of interior angles; isocleces triangle)

10x + 40 = 180

10x = 140

x = 14

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3 years ago

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Solve this equation for x. Round your answer to the nearest hundredth. 7 = In(x + 5)

oksian1 [2.3K]

Answer:

x ≈ 1091.63

Step-by-step explanation:

Using the rule of logarithms

$log_{b}$ x = n ⇔ x = $b^{n}$

note that ln x is to the base e

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ln(x + 5) = 7, then

x + 5 = $e^{7}$ ( subtract 5 from both sides )

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3 years ago

Madison can lift 200 kilograms with ease. how much is this in pounds

Firlakuza [10]

Answer:440.925

Step-by-step explanation:

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3 years ago

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What is 1/5 × -3/2 +4/5 × -2/7 × -1/6 × -2/7

velikii [3]

Answer:

$\frac{-457}{1470}$

Step-by-step explanation:

$\frac{1}{5} \times \frac{-3}{2} + \frac{4}{5} \times \frac{-2}{7} \times \frac{-1}{6} \times \frac{-2}{7}$

$(\frac{1}{5} \times \frac{-3}{2}) + (\frac{4}{5} \times \frac{-2}{7} \times \frac{-1}{6} \times \frac{-2}{7})$

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I need help pls is only 1 question

Yanka [14]

Answer:

$T = 1300$

Step-by-step explanation:

Given

$Radius, r = 9\ in$

$Height, h = 14\ in$

See attachment

Required

Determine the total surface area, T

T is calculated using:

$T = 2\pi r(r + h)$

Substitute values for r and h

$T = 2\pi * 9(9 + 14)$

$T = 2\pi * 9(23)$

Remove bracket

$T = 2\pi * 9*23$

$T = 2\pi * 207$

Take $\pi = 3.14$

So, we have:

$T = 2 * 3.14 * 207$

$T = 1299.96$

$T = 1300$ --- approximated.

Hence, the surface area is 1300 square inch

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3 years ago