Aplanet's year is the time it takes that planet to revolve around the sun. a mars year is 1.88 earth years. if you are 13 years old in earth years, about how old would you be in mars years?

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

3x + 4y = 5 x- 3y = -7 solve by substitution

Rick is driving to his uncles house in greenville, which is 120 miles from ricks town .after covering x miles rick she's a sign stating that greensville is 20 miles away. which equation when solved will give the value of x. a: x+120 = 20 b: x x120 =20 c: x +20 equals 120 d: x x20= 120