Expressions, Equations, Inequality

By: :]

BenchmarkMA.7.10.3 Solve linear equations& inequalities

with One (1) variable using algebraic methods, manipulative, or models.

Assignment Number #20

Expressions, equations, &inequality

Definitions

• Expressions: A variable or combination of variables, numbers, &symbols that represents a mathematical relationship.

• Equations: A statement that two mathematical expressions are equal.

• Inequality: A mathematical sentence that compares two unequal expressions using: greater than , less than etc.

Examples

• An example of expressions is: 4r, 3x+2y

• An example of equations is: n+50=75 means that n+50 must equal 75.

• An example of ineqaulity is: x>2 X is a value greater than 2!

25

Questions??? Cindy is 6 years older

than Phil. In two years the sum of their ages will be 30. How old is Cindy?

C=Cindy & P=Phil

C=6+P(C+2)+(P+2)=30

(6+P+2)+(P+2)=302P+10=302P=20P=10

C=6+10C=16Cindy is 16 & Phil is 10.

Check: (16+2) + (10+2) = 30

Resources

Definitions from: Math On Call Some Pictures from: Google

Crazyy picture from Laulima Website!!! Special Thanks too…………

Me:] Jamielynn:] Summer:]

Mr.Imamura:p && everyone else