The Johanssens are traveling across the country to visit relatives. Mr. Johanssen set the cruise control and drove at a constant speed for 622.2 miles. He took breaks, but
remained at an average constant
speed when driving. Some of the data related to the
trip appear in the table below.

go on the tube you might find some information there

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 -

6

step-by-step explanation:

113.42

i hope that is right.

step-by-step explanation: