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Y_Kistochka [10]
3 years ago
10

Expand and simplify (x+9)(x-3)

Mathematics
1 answer:
Natasha_Volkova [10]3 years ago
4 0

Answer:

x² + 6x-27

Step-by-step explanation:

(x+9)(x-3)      (expand by distributive property)

=  x(x) -3(x) + x(9) -3(9)   (simplify)

= x² -3x+9x-27

= x² + 6x-27

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The volume of a rectangular solid can be written as V=LWH, where L is the length of the solid, W is the width, and H is the heig
marshall27 [118]

Answer:

The length of the rectangle is 9 inches.

The height of the rectangle is 11 inches.

Step-by-step explanation:

Given : The volume of a rectangular solid can be written as V=LWH, where L is the length of the solid, W is the width, and H is the height. A box of cereal has a width of 2 inches. It’s height is 2 inches longer than it’s length. If the volume of the box is 198 cubic inches.

To find : What are the length and height of the box ?

Solution :

The width of the box is L inches

The width of the box is W=2 inches

The height is 2 inches longer than it’s length i.e H=L+2

The volume of a rectangular solid is V=L\times W\times H

198=L\times 2\times (L+2)

99=L^2+2L

L^2+2L-99=0

L^2+11L-9L-99=0

L(L+11)-9(L+11)=0

(L+11)(L-9)=0

L=-11,9

Reject L=-11 as dimension cannot be negative.

The length of the rectangle is 9 inches.

The height of the rectangle is 11 inches.

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Which of the following graphs has a slope of<br> -5 and a y-intercept of 4?
olga2289 [7]

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Step-by-step explanation:

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Solve for this equation for r:<br><br> r+2s/2=6+t
docker41 [41]
R+2s/2=6+t
r+s=6+t (Divide 2s by 2 giving you just 2)
r=6+t-s (subtract s from both sides positive s and negative s cancel out leaving                         only r on the left and negative s on the right.)
the answer is
r=6+t-s
4 0
3 years ago
Read 2 more answers
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