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If x is 4 then 34.5x evaluates to 34.5 times 4 = 138

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Q: How do you evaluate the expression 34.5x when x is 4?

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The answer is x = 5. There is nothing to evaluate there!

Evaluate the expression below when x = 2.3x2-2x+4

13

Take 3 and substitute into the expression given to you but not mentioned in the question here and evaluate the expression. "Sub and Solve" I say.

X = 7 9x - 2x = 49

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The answer is x = 5. There is nothing to evaluate there!

5gz = 5 x 3 x 4 = 60

5gz = 5 x 3 x 4 = 60

Evaluate the expression below when x = 2.3x2-2x+4

There is no box below!

13

explain how to evaluate an algebraic expression for given variables. how would we evaluate the expression "3x-4y+9" when x=2and y=5?

Take 3 and substitute into the expression given to you but not mentioned in the question here and evaluate the expression. "Sub and Solve" I say.

It is x*x + y*y*y*y

x264: Without knowing the value of x you cannot evaluate this expression.

Evaluating a function called f(x) at f(4) basically means you set x = 4 in f(x) and solve. In other words, you solve the expression for x = 4. In this case: f(x) = 3x + 7f(4) = 3(4) + 7f(4) = 12 + 7f(4) = 19So, if you evaluate this function for f(4), you get 19.

Without further information, it is not possible to evaluate or simplify the expression.

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