Vocab
Identify what the expression, coefficient, variable, and constant is in the following equation.( include the values)
-9 + 3x = 18
expression: -9 + 3x & 18
coefficient: 3
constants: -9 & 18
Simplify 2a + 4a
6a
−9x = −81
What is 9
−2 = 2 + 4v
v=-1
Aliyah had $24 to spend on seven pencils. After buying them she had $10. How much did each pencil cost?
WRITE AN EQUATION AND SOLVE!!!!
24= 7p +10
Each pencil cost $2.
What is the first step in solving a two step equation?
Undo the addition/subtraction thats being done to the variable in the equation on BOTH sides of the equal sign.
Write the equivalent expression for -6d + 11d - d
4d
25 = x + 15
x = 10
−15 = −4m + 5
m = 5
331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students were in each bus?
WRITE AN EQUATION AND SOLVE!
331= 6b +7
54 students on each bus
What is the second step in solving a two step equation?
Undo the multiplication/division that is being done TO THE VARIABLE on BOTH sides of the equal sign.
Simplify -4(c +9)
-4c -36
-14 = s/5
s = -70
3p - 17 = 13
p = 10
Daniel had $25 to spend at the fair. If the admission to the fair is $4 and the rides cost $1.50 each, what is the greatest number of rides Daniel can go on?
WRITE AN INEQUALITY AND SOLVE!!!!
25 > 4 + 1.50r
Daniel can go on 14 rides.
When solving two step equations with fractions, what do you have to do?
(In your notes from early October)
Multiply by the reciprocal fraction
Find the equivalent expression for 2a - (6a +3)
-4a -3
16x = -134
x= - 8.375
Maria bought seven boxes. A week later half of all her boxes were destroyed in a fire. There are now only 22 boxes left. With how many did she start?
WRITE AN EQUATION AND SOLVE!!
22 = x/2 + 7
She started with 30 boxes.
What does the word inverse mean? Write the different operations and their inverse.
The word inverse refers to the opposite of another operation.
addition - subtraction
subtraction - addition
multiplication- division
division - multiplication
Simplify -5d -12d + d - 8 -3 + 6y
-16d -11 + 6y
(2/3)h = 6
h=9
(3/4)y +5 =20
y = 20
The seventh grade class is putting on a variety show to raise money. It cost $700 to rent the banquet hall that they are going to use. If they charge $15 for each ticket, how many tickets do they need to sell in order to raise at least $1000?
WRITE AN INEQUALITY AND SOLVE!!!!
700 + 15t > 1000
They need to sell at least 20 tickets.