evaluate the expression when ( b = - 5 ) and ( y = 7 ).\n( - y + 2 b )
evaluate the expression when ( b = - 5 ) and ( y = 7 ).\n( - y + 2 b )
Answer
Explanation:
Step1: Substitute the values
Substitute ( b = - 5) and ( y = 7) into the expression (-y + 2b). We get (-7+2\times(-5)).
Step2: Perform multiplication
According to the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction), first calculate (2\times(-5)). (2\times(-5)=-10). So the expression becomes (-7+(-10)).
Step3: Perform addition
(-7+(-10)=-(7 + 10)=-17).
Answer:
(-17)