What is the sum (6x3 – 5x2 + 3x – 5) + (8x4 + 3x3 + 5x2 + x + 4)?

8
x
4
+
9
x
3
+
4
x
−
1
8
x
4
+
9
x
3
+
4
x
-
1

PLEASE GIVE ME BRAINLIEEST


63x-9

Explanation:

[6x(3)−5x(2)+3x−5] + [8x(4)+3x(3)+5x(2)+x−4]

Step 1- Simplify

[(18x)+(−10x)+(3x)+(−5)] + [(32x)+(9x)+(10x)+x−4]

Step 2- Combine like terms

—————i wrote it down to help you visualize the like terms

///like terms with x variable///
(((like terms that are real #s)))

///18x+−10x+3x///+(((−5))) + ///32x+9x+10x+x///+(((-4)))—————

So basically:
(18x+−10x+3x+32x+9x+10x+x) + (-5+−4)

Step 3- solve:

18x+−10x+3x+32x+9x+10x+x)= 63x
(-5+−4)= -9

= 63x-9

The 10 values of reported height are ...

... 61, 68, 57.5, 48.5, 75, 65, 80, 68, 69, 63

Their total is 655, so their average is 655/10 = 65.5 . . . . . your 3rd selection