What is the quotient of the problem?

answer: f(x)=2x−21 is 2.

step-by-step explanation: find the difference quotient for f(x)=2x−21.

a difference quotient is given by f(x+h)−f(x)h

to find f(x+h), plug x+h instead of x:

f(x+h)=2(h+x)−21

finally, f(x+h)−f(x)h=(2(h+x)−21)−(2x−21)h=2

                        __the difference quotient for f(x)=2x−21 is

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -