The sum of 8x^2-x+4 and x-5 is
1) 8x^2+9
2)8x^2-1
3)8x^2-2x+9
4)8x^2-2x-1
explain how you got your answer

8x² - 1

Step-by-step explanation:

Summing the 2 expressions together gives

8x² - x + 4 + x - 5 ←  collect like terms

= 8x² + (- x + x) + (4 - 5)

= 8x² + 0 + (- 1) = 8x² - 1

Option 2

Step-by-step explanation:

8x²-x+4

+    x-5

=

8x²-1

yes because a quadrilateral is equal to 4 sides and a rhombus has 4 sides so technacly it is a quadrilateral.

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x