Question

2.subtract 4x-5 from 2x-7 . arrange the expressions horizontally



3. subract these expressions. calculate horizontally or rewrite the calculation vertically,

a. (4x+1) - (9x-1)
b.-2k(k+3)-k(3k+5)
c.(5x-2y)-5(x+2y)

i need help )*.*(

Answer 1

It's asking you to write it like this:
2x-7
- 4x-5
------

Just subtract (which will result in a negative value in front of x).
Question 3 is just asking you to do this multiple times.

Answer 2

So, the next three expressions would look like:
a. 4x+1
- 9x - 1
-------

b.\[-2k(k+3) - k(3k + 5) = -2k^2 - 6k - 3k^2-5k\]
Group like terms together:
\[-2k^2 - 3k^2 - 6k -5k\]

c. 5x-2y - 5(x+2y) = 5x - 2y - 5x + 10y
Grouping like terms:
5x - 5x + 10y - 2y

I leave the rest for you. ^_^