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3 years ago

There are 8 math classes in 7th grade.

Mathematics

1 answer:

gtnhenbr [62]3 years ago

5 0

Answer:

27 in each of the 7 classes

Step-by-step explanation:

First you would subtract 32 from 221

221 - 32 = 189

Then you would divide 189 (the total remaining students not in the 8th class) and divide by 7 (the total of classes remaining with equal students)

This will give you 27

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3 years ago

How do I calculate this? Is there a formula?

alex41 [277]

Answer:

Height of cables = 23.75 meters

Step-by-step explanation:

We are given that the road is suspended from twin towers whose cables are parabolic in shape.

For this situation, imagine a graph where the x-axis represent the road surface and the point (0,0) represents the point that is on the road surface midway between the two towers.

Then draw a parabola having vertex at (0,0) and curving upwards on either side of the vertex at a distance of $x = 600$ or $x = -600$ , and y at 95.

We know that the equation of a parabola is in the form $y=ax^2$ and here it passes through the point $(600, 95)$ .

$y=ax^2$

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$a=\frac{19}{72000}$

So new equation for parabola would be $y=\frac{19x^2}{72000}$ .

Now we have to find the height $(y)$ of the cable when $x= 300$ .

$y=\frac{19 (300)^2}{72000}$

y = 23.75 meters

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3 years ago

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The lcm of 6 and 18 is C.)18

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AVprozaik [17]

Answer:

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago