Unknown Variables
If 3x - 21 = 12, what is x?
11
Y=3x +45 Where x = 4. What is Y.
57
What is the difference between an expression and an equation?
Equations have = signs and are made up of two expressions.
True or False.
When a linear number pattern is plotted on a graph, it will result in a straight line.
6x = 36. What is the value of x?
6
A statement that two mathematical expressions are equal and have the same value.
What is an algebraic equation/expression.
Halley's comet appears approximately every 76 years, since it was first recorded in the year 1758. What year did it appear for the 3rd time, including the sighting?
1910.
True or False.
The number of hours worked compared to the amount of money earned. Is a linear relation.
Yes. True!
If X =9 solve 9x-76+6?
11
If T=2.5 then what is T-4
- 2.5
A school pays $125 to design gym T-shirts. It costs an additional $25 to make each T-shirt. How much would it cost to make 25 T-shirts?
$750
What is a linear relation?
A relation that appears as a straight line when graphed.
If X=122 and Y=153 What is 3x + 4y?
978
If x=50, Solve 50x.
2500
Mr. B buys a medium coffee each morning (He doesn't really). How much would he spend if the coffee was $1.83 plus 13% tax, over 30days?
$62.10 approx
What is....
Four more than nine times a number.
Written as an algebraic statement.
6n + 4
If b= 210 and y = 52, what is 2b + 2y + b + y
786
If 3x=78.87 then what is X x 68.65
What is 1804.8085
Harry scored 2 points in his first game of Quidditch. After that, he became better and was able to improve his score by 2 in every game after the next one. How many points did he have in his 5th game?
x 1, 2, 3, 4, 5, 6
y 2, 4, 6, 9, 10, 12
y = 2x 10 points in 5th game
What is the equation?
x y
0 1
1 4
2 7
3 10
y = 3x+1