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.

The expression which shows Number of miles more Allison hiked than Adrian is .

Step-by-step explanation:

Number of miles Allison hiked =

Number of miles that Adrian hiked =

We need to find Number of miles more Allison hiked than Adrian.

To Find Number of miles more Allison hiked than Adrian we will Subtract Number of miles that Adrian hiked with Number of miles that Allison hiked.

Framing in equation form we get;

Number of miles more Allison hiked than Adrian = Number of miles that Adrian hiked -  Number of miles that Allison hiked

Number of miles more Allison hiked than Adrian =

Hence, The expression which shows Number of miles more Allison hiked than Adrian is .

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81

emily solved for a part when she should have solved for the whole. 875,000 should be the numerator of the equivalent ratio. 70 x 12,500 is 875,000. so the answer is 100 x 12,500 which is 1,250,000.