10x - 7 + 8x
18x -7
Determine whether the ordered pair is a solution of y=2x- 2. (1,0)
Yes Its a Solution
(−12) + 7
-5
?-5 • (-?5)
25
The value 3 is taken away from 7. What is the result?
7-3=4
5 + 2(8x +4)
16x +13
Determine whether the ordered pair is a solution of y= 5x (2,11)
Not a solution
(−8) − (−6)
-2
-18 ÷ 9
-2
Lara and Mae participated in a quiz contest. They scored 23 points in all. If Lara scored 9 points, how many points did Mae score?
x+9=23
x=14
5 + 2x + y - 2x - 1
y - 4
Determine whether the ordered pair is a solution of 3x + 2y = 1 (1,-1)
Yes its a solution
10 + 3 − (−8)
21
(−3)(3)(−3)(−3)
-81
Jamie paid the rent well past the due date for the months of April, May and June. As a result, he had been charged a total of $75 as late fee. How much did he pay as late fee per month?
3x=75
x=25
52 = 2x + 6x - 4
X = 7
Complete the table for y=-2x; for x=-4, 0, 3
(-4,8), (0,0), (3,-6)
(−6) − 4 − (−4)
-6 = a/4 + 2
a=-32
331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students were in each bus?
331-7=324
324/6=54 students
-6(1 - x) = 5(1 - x)
Complete the table for y=-x - 2; For x = -3, 0, 4
(-3,1), (0,-2),(4,-6)
What is the rule for Adding Integers & Subtracting Integers
If the numbers are the same sign add; If the number has different signs subtract. The biggest number will determine if the number is positive or negative.
Change the subtraction sign to addition, then change the sign of the second number.
n + 5 /−16 = −1
N= 11
A scientist is measuring the temperature change in a chemical compound. The temperature dropped 11 °F per hour from the original temperature. After 4 hours, the temperature was 90 °F. Find the compound's original temperature.
At t= 4 hours and x= 90°F, we have
Hence , the compounds original temperature = 134°F