Answer:
1). Option (2)
2). Option (4)
Step-by-step explanation:
1). Formula to evaluate the actual cost 'a' of an item with original price 'm' and a discount coupon for 'n' dollars applied will be,
a = m - n
n = m - a
Therefore, expression (2) will be the answer.
2). Deon ride a 15 mi bicycle trail.
Average speed of the trail is = 20 miles per hour
From the formula,
Speed = 
Time = 
=
hours
Therefore, Option (4) will be the answer.
Answer:
b. 
Step-by-step explanation:
(-2, 9)

(-1, 3)

(0 1)

Hope this helps
Answer:
J(-2,8)
Step-by-step explanation:
Answer:
no solution
Step-by-step explanation:
the answer is 0.605 if you need help message me