Find the x-intercept(s) and the coordinates of the vertex for the parabola y=x+4x-21. If there is more than one x-intercept, separate them with commas.

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step-by-step explanation:

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

it would take 5 hours i think idk i'm not that good at math.can you me with my questions i need asap.