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3 years ago

The simplest form of the expression -2x2(x – 5) + x(2x2 – 10x) + x is ____________ .

Mathematics

1 answer:

Mars2501 [29]3 years ago

5 0

Answer:

Step-by-step explanation:

Given

- 2x²(x - 5) + x(2x² - 10x) + x ← distribute both parenthesis

= - 2x³ + 10x² + 2x³ - 10x² + x ← collect like terms

= x

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3 years ago

A group of students are planning a mural at a wall the rectangular wall has dimensions of (6x+7) by (8x+5) and they are planning

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Answer: $46x^2+73x+15$

Step-by-step explanation:

The area of a rectangle can be calculated with the formula:

$A=lw$

l: the length of the rectangle.

w: the width of the rectangle.

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Knowing that the dimensions of the wall are $(6x+7)$ by $(8x+5)$ , its area is:

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As they are planning that the dimensions of the mural be $(x+4)$ by $(2x+5)$ , its area is:

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Then the area of the remaining wall after the mural has been painted is:

$A_{(remaining)}=A_w-A_m\\\\A_{(remaining)}=48x^2+86x+35-(2x^2+13x+20)\\\\A_{(remaining)}=48x^2+86x+35-2x^2-13x-20\\\\A_{(remaining)}=46x^2+73x+15$

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ladessa [460]

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904.778 in.

Step-by-step explanation:

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=904.778 inches

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