definition
What is a variable?
Variable is an UNKNOWN number. (e.g., x, y, b, c)
What an inverse operation for +
minus/ subtraction
7=S+5
S= 2
2=6÷ M
M=3
p= 21
What is an equation?
Equation is a way to say that two things are equal. It contains an equal sign.
What is an inverse operation for -
6=7-L
L=1
5=R x 1
R=5
Natalie buy sorganic almonds priced at $77 from the grocery store. How much did she pay the cashier, if she received $23 in change?
N= 100
Which one is an example of an expression and WHY?
1) 3x+4y=56
2)45y=356
3)5c-54
4)4r x 4= 123
3) 5c-54 because it does not contain an equal sign
What is an inverse operation for division
34=84-V
V=50
9 ÷ F= 3
F= 3
Trevor takes up a test at school and completes it in an hour. The test has two sections. If he takes 35 minutes to complete the first section, how much time does he have left to complete the second section?
25
What is a coefficient?
number is used to multiply a variable
What is an inverse operation for multiplication
division
Z-24=14
Z=10
9 X H = 135
H= 15
Augustine is selling his baseball cards at a yard sale. He is selling his cards for $3 each. At the end of the yards sale, he made $60. How many baseball cards did he sell?
20
What is an inverse operation? give me an example
opposite. multiplication is division. addition becomes subtraction.
what an inverse operation for this equation
45=6 x r
division
94-E=47
E= 47
5= 125 ÷ Y
Y= 25
A movie theatre has 9 rows of seats. In each row, there are 11 seats. How many total seats are in the movie theatre?
99