Vocabulary
a letter in an expression or equation
variable
Simplify the expression:
-7x+2-3x
-10x + 2
Solve for x:
-12=x+4
x=-16?
-23+8-(-12)
-3
What is the opposite of -5?
5
you can change the order and it does not change the product (be very specific!)
commutative property of multiplication
Simplify the expression:
2y^2+y^2-5y^2
-2y^2
Solve for x:
x/.2=12
x = 2.4
(-9)(3)(-5)-(-1)
136
True or false:
Zero is neither negative nor positive
true
number in an expression/equation (no variable)
constant
Simplify:
-(2z-v-5)
-2z+v+5
Solve for x:
5x=225
x=45
7.28-9.04
-1.76
answer to a division problem
quotient
Identify the coefficients in this expression:
4x^2-9x+2
4 and -9
Simplify:
-5(-w-3z)-2(5z-7w)
19w+5z
Solve for x:
.8x=86
x=107.5
-3.4(0.23)
-0.782
Evaluate when x=-3 and y=8:
-x+(-y)
-5
definition of solution
a number in an equation with a variable that makes a true statement
Simplify:
-2(5x-2)+(5x-y)-(10y-12x)
7x+4-11y
Solve for x:
36=.06x
x=600
9.568/.23
41.6
Sarah wants to buy 10 cupcakes total: red velvet, chocolate and vanilla.
If red velvet is r and chocolate is c, write an expression for how many vanilla cupcakes she'll buy.
10 - r - c
OR
10 - (r + c)