College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.1 - Page 17: 1


$7+5x$ for $x=10$ $=7+5(10)$ $=7+50$ $=57$

Work Step by Step

To evaluate an expression for a given value, substitute the given value for the variable in the expression and then solve. For this problem, substitute 10 for the 'x'. As the 'x' is right next to the number 5, it is implied that the two are multiplied together. The order of operations indicates that multiplication comes before addition, so first multiply the 5 and 10, then add 7 to the product.
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