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2 years ago

Y^2-4xy-7y+28x please send the answer asap

Mathematics

1 answer:

Veronika [31]2 years ago

6 0

Answer:

= (y - 4x) (y - 7)

Step-by-step explanation:

y^2-4xy-7y+28x

factor out y from y^2 - 4x : y(y - 4x)

factor out 7 from 28x - 7y : 7(4x - y)

= y (y - 4x) + 7(4x - y)

7 (4x - y) + 7(y - 4x)

= y (y - 4x) - 7(y - 4x)

= (y - 4x) (y - 7)

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A rectangular piece of tin has an area of 1056 square inches. A square of 3 inches is cut from each corner, and an open box is m

kvv77 [185]

Answer:

44 inches and 24 inches

Step-by-step explanation:

Let $l,b$ denotes length and breadth of a rectangle.

$lb=1056$

A square of 3 inches is cut from each corner, and an open box is made by turning up the ends and sides.

New length $=l-6$ inches

New breadth $=b-6$ inches

Height of box $=3$ inches

Volume of box = length × breadth × height

$(l-6)(b-6)3=2052$

$lb-6l-6b+36=684\\6(l+b)=408\\l+b=68\\b=68-l$

Put $b=68-l$ in $lb=1056$

$l(68-l)=1056\\l^2-68l+1056=0\\l^2-44l-24l+1056=0\\l(l-44)-24(l-44)=0\\(l-24)(l-44)=0\\l=24,44$

At $l=24,b=\frac{1056}{24}=44$ inches

At $l=44,b=\frac{1056}{44}=24$ inches

8 0

3 years ago

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Radda [10]

Answer:

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Step-by-step explanation:

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3 years ago

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Mekhanik [1.2K]

Answer:

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Step-by-step explanation:

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3 years ago

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Find the GCF of 170 anf 210.