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Katarina [22]
3 years ago
11

Which expression represents the perimeter of the rectangle above?

Mathematics
1 answer:
Arisa [49]3 years ago
7 0

Answer:

12x-8

Step-by-step explanation:

Added both equations and used PEMDAS to combine all equations

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PLEASE ANSWER THIS . Goran's company makes solid balls out of scrap metal for various industrial uses. For one project, he must
Ainat [17]

Cost of aluminum required to make a ball of radius 7.5 inches is $ 161.71

<h3><u>Solution:</u></h3>

Given that  

Goran's company makes solid balls out of scrap metal for various industrial uses.

For one project, he must make aluminum balls that have a radius of 7.5 inches.

Cost of aluminum = $0.12 per cubic inches

Need to determine cost of aluminum to make one ball.

Lets first calculate the volume of one ball

As shape of the ball is sphere , we can use volume of sphere formula

\text {Volume of ball }=\text { Volume of sphere }=\frac{4}{3} \pi r^{3}

Where "r" is the raius of ball

Given that radius of required ball = 7.5 inches

\text { So, volume of ball of radius } 7.5 \text { inches }=\frac{4}{3} \pi \times 7.5^{3}

=\frac{4}{3} \times 3.14 \times 321.875=1347.5833 \text { cubic inches }

So quantity of aluminum required is same as volume of ball = 1347.5833 cubic inches  

Cost of aluminum for 1 cubic inch = $0.12

<em><u>So cost of aluminum required to make a ball of aluminium of 1347.5833 cubic inches is given as:</u></em>

=0.12 \times 1347.5833=\$ 161.71

8 0
3 years ago
What is the slope of the line through (3,2) and (-3,4)?
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Answer:

slope = - \frac{1}{3}

Step-by-step explanation:

calculate the slope m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (3, 2 ) and (x₂, y₂ ) = (- 3, 4 )

m = \frac{4-2}{-3-3} = \frac{2}{-6} = - \frac{1}{3}

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2 years ago
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dimaraw [331]

Answer:

Step-by-step explanation:

<em>*The part about how many books per student is irrelevant to the question*</em>

<em />

<em>All you need to do is multiply </em><u><em>18 rows</em></u><em> by </em><u><em>4 students per row</em></u><em>.</em>

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18 * 4 = 72 total students on bus

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