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3 years ago

Open Picture Need Help With 11 & 12

Mathematics

1 answer:

likoan [24]3 years ago

4 0

Answer:

Step-by-step explanation:

7). (x + 3)(x + 7)

= x(x + 7) + 3(x + 7)

= x² + 7x + 3x + 21

= x² + 10x + 21

8). (4x + 2)(x - 2)

= 4x(x - 2) + 2(x - 2)

= 4x² - 8x + 2x - 4

= 4x² - 6x - 4

9). (3x + 2)(2x + 5)

= 3x(2x + 5) + 2(2x + 5)

= 6x² + 15x + 4x + 10

= 6x² + 19x + 10

10). (x² - 6)(x - 4)

= x²(x - 4) - 6(x - 4)

= x³ - 4x² - 6x + 24

11). (x² + 9)(x - 3)

= x²(x - 3) + 9(x - 3)

= x³ - 3x² + 9x - 27

12). (4x²- 4)(2x + 1)

= 4x²(2x + 1) - 4(2x + 1)

= 8x³ + 4x² - 8x - 4

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3 years ago

A rectangular sign has length of 3 and 1/2 ft and a width of 1 and 1/8 ft. Will the area of the sign be greater or less than 3 a

zavuch27 [327]

Answer:

$Area = 3\dfrac{15}{16}\ sq\ ft$

Area is greater than $3\frac{1}{2}$ sq ft.

Step-by-step explanation:

Length of rectangular sign board = $3\frac{1}{2}$ ft

Width of rectangular sign board = $1\frac{1}{8}$ ft

Area of a rectangle is given by the formula:

$A = Length \times Width$

To find the area, we are going to multiply $3\frac{1}{2}$ with $1\frac{1}{8}$ .

$1\frac{1}{8}$ is greater than 1.

Therefore the multiplication will be greater than $3\frac{1}{2}$ .

Hence, we can say that area will be greater than $3\frac{1}{2}$ sq ft.

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