Zach and ginny are building model cars. ginny's car is 2 more than 3 times the length of zach's car. the sum of the lengths of both cars is 30 inches write an equation to determine the lengths of zach's and ginny's cars.
a.3x + 2 = 30
b. x + 2 + 3x = 30
c.2x + 3 = 30
d. x + 2x + 3 = 30

  b.   x + 2 + 3x = 30

step-by-step explanation:

if x represents the length of zach's car, then 2+3x is the length of ginny's car. the sum of those lengths is 30 inches, so an appropriate equation is

  x + 2+3x = 30 . . . matches selection b

the correct answer is b

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