How do I evaluate an expression

1. Replace each variable in the expression with the assigned value.

2. Perform the operations in the expression using the correct order of operations.

Step-by-step explanation:

Here's an example. Let's evaluate the expression 2x³ – x² + y

for x = 3 and y = –2.

Replace each variable in the expression with its value. In this example, this means each x becomes a 3 and each y becomes a -2. (It's a good idea to use parentheses to keep track of this.)

So 2(3)³ - (3)² + (-2)

Perform operations with exponents.

2(27) - 9 + (-2)

Perform operations with multiplication and division.

54 - 9 +(-2)

Perform operations with addition and subtraction

43

I hope this helps!

Let me know if u have any questions :}

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.

b. f(x) = –√x + 3this is the correct answer