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3 years ago

When X equals eight, Y equals 20 find Y when x equals 42

Mathematics

2 answers:

snow_tiger [21]3 years ago

6 0

If x equals 8 but then equals 42 then you multipled by 5.25, so multiply 20 by 5.25. Which is 105, then y equals 105.

gavmur [86]3 years ago

4 0

Y is equal to 105 because you divide 42 by 8 and get 5.25 (the amount it increased). then you multiply by its previous version 20 to get 105.

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Galina-37 [17]

Answer:

$A = 12n^4-15n^3-3n^2$

Step-by-step explanation:

The dimensions of a rectangle are length and breadth/width

Here we are given height . Assuming it to be one of the side of the rectangle , we will do the further calculation

Hence one side is

side 1 = $3n^2$

And the other side is

Side 2 = $4n^2-5n-1$

The area of rectangle = side 1 x side 2

$A=3n^2 \times (4n^2-5n-1)$

$A=3n^2 \times 4n^2-3n^2 \times 5n-3n^2 \times 1$

$A=3 \times 4 \times n^2 \times n^2- 3 \times 5 \times n^2 \times n - 3n^2$

$A = 12n^4-15n^3-3n^2$

Hence area can be given as expression

$A = 12n^4-15n^3-3n^2$

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