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2 years ago

7

Which graph represents the inequality? 18x−3y<−21

2 answers:

ozzi2 years ago

6 0

I'm going to go with C.
The inequality isn't greater than OR EQUAL TO which marks out B and D.
The inequality is showing that it is greater than -21 meaning that the shaded area should be towards the positive which in turn marks out A.

tester [92]2 years ago

4 0

First, you solve or simplify the inequality.

Divide everything by 3.
6x - y < -7

Subtract 6x from both sides.
-y < -6x - 7

Divide everything by -1
y > 6x + 7

Since there isn't a line under the sign, it will be a dotted line on the graph. And since it is greater than, the right side of the line will be shaded. Therefore, the answer is C

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klio [65]

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2 years ago

A building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18 \pi18π18, pi

katrin [286]

The area of the cross section of the column is $18 \pi \ m^2$

Explanation:

Given that a building engineer analyzes a concrete column with a circular cross section.

Also, given that the circumference of the column is $18 \pi$ meters.

We need to determine the area of the cross section of the column.

The area of the cross section of the column can be determined using the formula,

$Area= \pi r^2$

First, we shall determine the value of the radius r.

Since, given that circumference is $18 \pi$ meters.

We have,

$2 \pi r=18 \pi$

$r=9$

Thus, the radius is $r=9$

Now, substituting the value $r=9$ in the formula $Area= \pi r^2$ , we get,

$Area = \pi (9)^2$

$Area = 81 \pi$

Thus, the area of the cross section of the column is $18 \pi \ m^2$

5 0

2 years ago

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faltersainse [42]

The answer is 9 because If x has to be less than 8 then it can’t be 9

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steposvetlana [31]

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2 years ago

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Anna [14]

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