9:Using the substitution method, Vito is solving the following system of
equations algebraically:
y + 3x = -4
2x - 3y = -21
-Which equivalent equation could Vito use?
(1) 2(-3x – 4) + 3x = -21
(3) 2x - 3(-3x – 4) = -21
(2) 2(3x – 4) + 3x = -21
(4) 2x - 3(3x - 4) = -21

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park is the cost of admission proportional to the amount of people entering the amusement park? explain.

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

Juanita wade's new car has an msrp of $28,902.11 including title and processing fees. the premier package which includes surround sound and dvd player costs three times the amount of the in-style package which includes leather seats and select wheels. the total cost of her new car was $34,290.08 which included the 6.5% sales tax. find the cost of the premier package to the nearest cent.