Answer:
1) Term - Terms are the elements separated by the plus or minus signs.
2) Coefficient - Coefficient is a number that is being multiplied by the variable.
3) Variable - A variable is a letter or symbol used as a placeholder for an unknown value.
4) Constant - Constants are the terms in the algebraic expression that contain only numbers.
5) Algebraic expression - An algebraic expression is a combination of integer constants, variables, exponents and algebraic operations such as addition, subtraction, multiplication and division.
6) Like terms - Like terms involve the same variable, x , raised to the same exponent, 2.
Y=-3/2 x + 0 or an other number
Let n = the hours elapsed when the two trains are 660 miles apart.
Let the first train travel east and the second train travel west.
The distance traveled by the first train is
x = (50 mi/h)*(n h) = 50n mi
The distance traveled by the second train is
y = (60 mi/h)*(n h) = 60n h
The distance between the two trains after n hours is
x + y = 50 n + 60n = 110n mi
Because this distance is 660 miles, therefore
110n = 660
n = 6 hours
Answer: 6 hours
I hope this helps. Sorry it took so long