Understanding Expressions and Equations

What is the unit of speed when a car travels 150 miles in 3 hours?

If the area of a rectangle is given by $$A = lw$$ , what are the appropriate units for $$A$$ if $$l$$ and $$w$$ are measured in meters?

What is the first step in solving the equation $$3x - 4 = 11$$ ?

What is the coefficient of $$x^2$$ in the expression $$-3x^2 + 8x - 1$$ ?

In the expression $$5x^2 + 3x - 7$$ , what is the coefficient of $$x$$ ?

What is an expression in mathematics?

Define a linear equation.

What does the term 'coefficient' refer to in an algebraic expression?

What is the difference between an expression and an equation?

How do you isolate a variable in an equation?