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3 years ago

What is the value of x?

Mathematics

2 answers:

valentinak56 [21]3 years ago

8 0

The value of X is D. 25
Every triangle adds up to 180 degrees so you just add up the given numbers, then subtract that number from 180 and that is your answer.

mylen [45]3 years ago

3 0

Letter A should be the answer. :D

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-5/12 - (-9/3) what is the answer for this equation

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Answer:

2 7/12

Step-by-step explanation:

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3 years ago

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3 years ago

Work out the surface area of a cylinder when the height = 18cm and the volume = 1715cm cubed

lara [203]

Answer:

813.4 cm² (nearest tenth)

Step-by-step explanation:

Volume of a cylinder

$\sf V=\pi r^2 h \quad\textsf{(where r is the radius and h is the height)}$

Given:

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Use the Volume of a Cylinder formula and the given values to find the radius of the cylinder:

$\implies \sf 1715=\pi r^2 (18)$

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$\sf SA=2 \pi r^2 + 2 \pi r h \quad\textsf{(where r is the radius and h is the height)}$

Substitute the given value of h and the found value of r into the formula and solve for SA:

$\implies \sf SA=2 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)^2 + 2 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)(18)$

$\implies \sf SA=2 \pi \left(\dfrac{1715}{18 \pi} \right) + 36 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)$

$\implies \sf SA=\dfrac{1715}{9} + 36 \pi \left(\sqrt{\dfrac{1715}{18 \pi}\right)$

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2 years ago

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WILL GIVE BRAINLIEST!

Allushta [10]

Answer:

7 hot dogs, 4 wings

5 hotdogs, 5 wings

Step-by-step explanation:

4H + 7W 《56

H = 7, W = 4

4(7) + 7(4) = 56《56

H = 5 , W = 5

4(5) + 7(5) = 55《56

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3 years ago