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3 years ago

Evaluate: 9 + x/5 for x = 30 15 16 17 18

Mathematics

1 answer:

mart [117]3 years ago

7 0

Answer:

$\bold{9+\frac{x}{5}=15}$

Solution:

Given: x=30

To solve: $9+\frac{x}{5}$

On substituting the value of x,

$9+\frac{30}{5}$

On dividing 30 and 5 we get,

$\Rightarrow 9+6 = 15$

So, the option is 15.

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3 years ago

What is the cross-sectional area of a cement pipe 2 in. thick with an inner diameter of 5 ft? Use pie 3.14.

Paul [167]

Answer:

1.60 $ft^{2}$

Step-by-step explanation:

Assuming that this is a cylindrical pipe, the area can be determined by applying the formula for calculating the area of a circle.

i.e Area = $\pi$ $r^{2}$

So that,

for the inner part of the pipe,

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

= $\frac{5}{2}$

= 2.5 feet

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= 3.14 x $(2.5)^{2}$

= 19.625

Are of the inner part of the pipe is 19.63 $ft^{2}$ .

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= 5.2 feet

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= 2.6 feet

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Area of the pipe is 21.23 $ft^{2}$ .

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2 years ago

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Answer and Step-by-step explanation:

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