Writing Algebraic expressions
Triple a number
3x
9v - 1.5v + 1.75v
9.25v
x - 4 = -5
x=-1
What is algebra
a branch of mathematics that involves symbols (such as x, y,)
5b^2 + 32b^2
37b^2
Three quarters of a number
3/4b
2d + d + 3d - 4d
2d
x + 9 = 19
x = 10
What is an expression? Give me an example of an algebraic expression?
a representation of a quantity. Expression can include a number, variable, and operation
2x +1
9x-4x
5x
Five plus half a number
5 + r
5 + 5a + 6b - 3b
5 + 5a +3b
x/3= -2
x= -6
What is an equation and give me an example of an algebraic equation
has an expression on either side of an equal sign
2x +1 = 1x + 2
-3x^2 - (-2x^2)
-x^2
Three times the product of two different numbers
3xy
10x - 3x
7x
3x=18
x=6
What is a variable and give me an example of one
represents and unknown number
x, b, w
-8a + 7a
-a
r^2
3x + x - 2x
2x
x/2 = 27
x=54
What is an operator? Give me an example of one.
a symbol that indicates a mathematical process (x / + -)
23x - (-2x)
25x