evaluate the expression for x 2 and y 3 answer PEMDAS rule means for the Parenthesis Exponent Multiplication Division Addition and Subtraction This rule is used to solve the equation in a proper and correct manner The expression is given below 3x 4y The value of the expression at x 2 and y 3 will be 3 2 4 3 6 12 18
Clickable Demo Try entering 2x x 3 into the text box After you enter the expression Algebra Calculator will evaluate 2x for x 3 2 3 6 Example PageIndex 3 evaluate Evaluate x 2 when x 10 We substitute 10 for x and then simplify the expression Substitute textcolor red 10 for x Use the definition of exponent When x 10 the expression
evaluate the expression for x 2 and y 3 answer
evaluate the expression for x 2 and y 3 answer
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3X 2Y
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By Substitution Method
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Example 2 Evaluate the expression a b 2 If a 3 and b 5 at a 3 and b 5 Solution Following Tips for Evaluating Algebraic Expressions first replace all occurrences of variables in the expression a b 2 with open parentheses a b 2 2 nonumber The expression 2 5r equals the cost of the roses which is 36 So you can replace cost of roses with 36 and get the expression 2 5r 36 Now you have an equation that you have to solve Solving this algebraically requires knowledge of algebra higher than what you ve got now so try using the guess and check method
Free math problem solver answers your algebra homework questions with step by step explanations 1 3 2 2 3 3 Multiply 3 by 2 and 3 by 3 because multiplication comes before addition or subtraction 2 6 2 9 Because we move from left to right we subtract first 3 4 9 13
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To evaluate an algebraic expression substitute the value of the variables into the expression We can evaluate an algebraic expression for different values of the variable To evaluate 3 x 1 for x 2 we substitute 2 in place of x 3 2 1 6 1 5 Remember to use order of operations to evaluate and be careful with the minus signs An example with three indeterminates is x 2xyz yz 1 Quadratic equation The values of x that satisfy the equation are called solutions of the equation and roots or zeros of the expression on its left hand side A quadratic equation has at most two solutions If there is only one solution one says that it is a double root
To evaluate the expression x 2y where x 3 and y 2 we substitute the values of x and y into the expression Substituting x 3 and y 2 into the expression we get 3 2 2 Solving this expression we have 3 4 2 which simplifies to 1 Evaluate the following expression when x 2 and y 3 Answer Select and check your answer A 31 B 29 C 11 D 11 Check Answer Step by Step Solution Step 1 First substitute x with x Remember to put brackets around 2 Step 2 Now multiply 5 with 2 You will get 10 The expression is now 10 7y
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evaluate the expression for x 2 and y 3 answer - The expression 2 5r equals the cost of the roses which is 36 So you can replace cost of roses with 36 and get the expression 2 5r 36 Now you have an equation that you have to solve Solving this algebraically requires knowledge of algebra higher than what you ve got now so try using the guess and check method