The expression 9x represents the number of miles allison hiked, and 4x+5 represents the number of miles that adrian hiked in x days. write an expression to show how many more miles allison hiked than adrian.
a. 5x-5
b. -5x+5
c. 5x+5
d. 13x+5

5x - 5

Step-by-step explanation:

Allison: 9x

Adrian: 4x - 5

To find the difference, we subtract Adrian's number of miles, 4x + 5, from Allison's number of miles, 9x.

9x - (4x + 5) =

We think of the negative sign to the left of the parentheses as a -1, and we distribute it by multiplying -1 by 4x and multiplying -1 by 5.

= 9x -1(4x + 5)

= 9x - 4x - 5

Now we combine like terms. The only like terms are 9x and -4x.

= 5x - 5

5x - 5

Step-by-step explanation:

Allison hiked more than Adrian:

Number of miles Allison hiked - Number of miles Adrian hiked

= 9x - (4x + 5)

= 5x - 5

EDITED VERSION AFTER RELISED I'M WRONG :D

Hope this help you :3

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

19

step-by-step explanation: