PLEASE HELP WILL MARK BRAINLKIEST

a) -x(4 -x +1)

b) 4 (x-1)

c) -12 - 3x + 3

Step-by-step explanation:

Most of it is really just a matter of substituting expressions in. here's how i did it:

f(x) = x-1

g(x) = 4

a) (f-g) x

= (x - 1- 4) x

= x(- 4+x-1)

= -x (4 - x + 1)

*you can take the negative out of the bracket or not, i did though - just makes it neater. They are both right.

b) (fxg) x

= (4(x-1)) x

= 4 (x-1)

*just bring the x to the front and times it with the 4

c) (f+g) x -3

= (x - 1 + 4) x -3

= -3 (4 + x -1)

= -12 - 3x + 3

*just bring the -3 to the front and times it with the whole bracket to expand since it said evaluate

Hope that helped : )

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed