The formula a = m − n represents the actual cost, a, of an item with original price m after a coupon for n dollars off is applied. Solve the formula for the amount of the coupon. Group of answer choices n = a − m
n=m−a
n=a+m
n = −m − a

ALSO THERES THIS QUESTION TOO

Deon plans to ride a 15-mi bicycle trail. If his average speed is 20 mi/h, which equation can he use to find the time t, in hours, for the ride? Group of answer choices
T = 20 - 15
T = 20 / 15
T = 20 x 15
T = 15 / 20
PLEASE HELP FAST

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.

i can answer this question sweetie!

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!