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# Variable, Expression

### Math

Write a variable expression to the algebraic expression. 3x+7 Three times a number plus seven
Write a variable expression to the algebraic expression. x-9 x minus nine/ nine less than x
Write a variable expression to the algebraic expression. x^2-2x two times x less that x squared/ x squared minus two times x
Write a variable expression to the algebraic expression. a/2b a qoutent of a number divided by two times a number.
Write an algebraic expression for the variable expression. Twice a number increased by 5 2b+5
Write an algebraic expression for the variable expression. The sum of a number and 6 n+6
Write an algebraic expression for the variable expression. the quotent of 8 and x 8/x
Write an algebraic expression for the variable expression. 9 less than a number x-9
Write an algebraic expression for the variable expression. The square of a number decreased by 3 n^2-3
Write an algebraic expression for the variable expression. The difference of x and x squared x-x^
Note the similarities and the differences in the following exspessions. 1.the sum of twice x and y 2.twice the sum of x and y 1. 2x+y 2. 2(x+y)
Note the similarities and the differences in the following exspessions. 1) 4 times the difference of a and b 2) the difference of 4 time sa and b 1) 4(a-b) 2)4a-b
Write the expression using exponents. 9 to the 3rd power 9^3
Write the expression using exponents. 8*8*8*8 8^4
Write the expression using exponents. 5*b*b*c*c*c
Evaluate the expression. 3^4 3*3*3*3=81
Evaluate the expression. 5^3 5*5*5=125
Evaluate the expression. 10^7 10*10*10*10*10*10*10
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