A squirrel throws an acorn from the top of an 18 foot tall tree. The acorn reachega height of 18.36 feet above the ground after 0.2 seconds and a height of 7 feet above the ground after 1 second.
1. Identify the independent and dependent variables.
Independent Variable:
Dependent Variable:

a

step-by-step explanation:

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 -