What is the value of the expression 3 – a – b when a = 15 and b = –3? –21 –15 –9 21

the answer is -9

Step-by-step explanation:

3 - 15 = -12

-12 - (-3) = 9 adding two negatives gives you a positive so its really, -12 + 3

Just substitute then solve

3-15-(-3)

-9

If it helps draw a number line

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 -10            -5                 0              5                   10

start at 3, then left 15 spaces, then right 3 spaces

-154

Step-by-step explanation:

100/2−(4)(50)−4

= 50−(4)(50)−4

= 50−200−4

= −150−4

= -154