3 years ago

1.) x 5 y 3• x 3 y 4 2.) 3x 2 y • 6xy 4

Mathematics

1 answer:

aksik [14]3 years ago

5 0

Answer:

( 5x+3y=7. < 3x - 5y = -23 you can use many ..

Step-by-step explanation:

hopefully its right

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An engineer is planning a new water pipe installation. The circular pipe has a diameter of d=20\text{ cm}d=20 cmd, equals, 20, s

aivan3 [116]

Answer: The answer is 314.28 cm² (approx.).

Step-by-step explanation: Given that an engineer is going to install a new water pipe. The diameter of this circular pipe is, d = 20 cm.

We need to find the area 'A' of the circular cross-section of the pipe.

Given, diameter of the circular section is

$\textup{d}=20~\textup{cm}.$

So, the radius of the circular cross-section will be

$\textup{r}=\dfrac{\textup{d}}{2}=\dfrac{20}{2}=10~\textup{cm}.$

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