Subtract -7n + 2 from 2n - 1. A. -9n + 3

B. -5n + 1

C. 9n - 3

D. 9n + 1

C) 9n - 3

Step-by-step explanation:

make an expression

2n - 1 - (-7n + 2)

open the parenthesis

2n - 1 + 7n - 2

combine like terms

9n - 3

pls refer ro the top for answer

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.