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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

How many solutions douse -5x-8=+8

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Answer: One solution

Step-by-step explanation:

Given

-5x-8=8

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3 years ago

The following equation defines f(x)=-3x-5 . If (-5,n) is an ordered pair of the function rule, what is the value of n?

ElenaW [278]

Given:

The function is

$f(x)=-3x-5$

(-5,n) is an ordered pair of the function rule.

To find:

The value of n.

Solution:

If (-5,n) is an ordered pair of the function rule, then the function must be satisfied by the point (-5,n). It means f(-5)=n.

Substitute x=-5 in the given function.

$f(-5)=-3(-5)-5$

$f(-5)=15-5$

$f(-5)=10$

We know that, $f(-5)=n$ . So,

$n=10$

Therefore, the value of n is 10.

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3 years ago