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3 years ago

PLEASE PLEASE PLEASE HELP!

Mathematics

2 answers:

love history [14]3 years ago

4 0

9514 1404 393

Answer:

x + 3

Step-by-step explanation:

If x > 5, the quantity x+3 is always positive. The absolute value symbol does nothing in that case, so the simplified expression is ...

x + 3

anyanavicka [17]3 years ago

3 0

Answer:

the answer is x+3

Step-by-step explanation:

:)))))

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Answer:

The amount of steel used = 94.38 $m^{2}$

Step-by-step explanation:

Height of the tank = 4.5 m.

Diameter of the tank = 4.2 m.

But,

radius = $\frac{diameter}{2}$

= $\frac{4.2}{2}$

radius = 2.1 m

Total surface area of a cylinder = 2 $\pi$ rh + 2 $\pi$ $r^{2}$

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

= 2 x $\frac{22}{7}$ x 2.1 (2.1 + 4.5)

= 44 x 0.3 (6.6)

= 87.12

Total surface area of a cylinder = 87.12 $m^{2}$

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$\frac{1}{12}$ x 87.12 = 7.26 $m^{2}$

Actual area of steel sheet used = 87.12 + 7.26

= 94.38 $m^{2}$

Thus, 94.38 $m^{2}$ of steel was used in making the tank.

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3 years ago