Evaluate 2(10 - d) + f, when d = 7 and f = -3. a. -2 b. 3 c. 9 d. 20

B.3

Step-by-step explanation:

2(10 - d) + f

d = 7 and f = -3

Substitute these value in

2(10 - 7) + -3

2 * (3) -3

6 -3

3

Put the values of d = 7 and f = -3 to the expression 2(10 - d) + f

Use PEMDAS:

PParentheses first

EExponents (ie Powers and Square Roots, etc.)

MDMultiplication and Division (left-to-right)

ASAddition and Subtraction (left-to-right)

2(10 - 7) + (-3) = 2(3) - 3 = 6 - 3 = 3

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.