7ab a - b
-------------- - --------------
a^2 - b^2 a + b

  7ab a - b
= -------------- - --------------
(a-b)(a+b) a + b

7ab   (a - b)^2
= -------------- - -----------------------
  (a-b)(a+b) (a + b)(a-b)

7ab a^2 - 2ab + b^2
= -------------- - -----------------------
  (a-b)(a+b) (a + b)(a-b)

7ab - a^2 + 2ab - b^2
= -----------------------------------
   (a-b)(a+b)

- a^2 + 9ab -  b^2
= -----------------------------------
   (a-b)(a+b)

Answer is A. first one

6 0

3 years ago

4x-5y=0 8x+5y=-60 what is the answer by substitution or elimination?

yuradex [85]

The answer is -5, -5 added by 5 cancels each other out. Then when you add 4x + 8x, you get 12x. So when you do 12x= -60, you get -5.

7 0

2 years ago

45 POINTS!! Please help me solve this Table I’m having a hard time this is my last chance to pass!

Anettt [7]

Solution:

Given function:

f(x) = x - 1

Solution (x = -2):

f(x) = x - 1
=> -2 - 1
=> -3

Solution (x = 0):

f(x) = x - 1
=> 0 - 1
=> -1

Solution (x = 2):

f(x) = x - 1
=> 2 - 1
=> 1

Solution (x = 3):

f(x) = x - 1
=> f(x) = 3 - 1
=> 2

8 0

2 years ago

Does the point (8, 2)satisfy the inequality 15x +18y = 16 YES OR NO

Marrrta [24]

false.No

Step-by-step explanation:

15x+18y=16

(8,2)

15(8)+18(2)=16

120+36=16

156=16

false

5 0

3 years ago