(1.5 +8.5) – [-(-2) + |-1.7|]

The c with these symbols | | is an absolute value sign, which means its the opposite of the number as in it turns from negative to positive. So turn it back.

(1.5+ 8.5)- [-(-2) + 1.7]

Then multiply the – with -2 which turns to a positive.

(1.5+ 8.5)- [ 2 + 1.7]

Then add the parantheses together and then the brackets (because of order of operations to get:

10 – 3.7=

You can figure this out.

Ok well like the other answerer said, just plug in those numbers and solve. The I I around the c, IcI, means “absolute value”. Absolute values are always positive, so in this equation you plug 1.7 in for c instead of -1.7. In an equation that was Ia + bI, you would take 1.5 + -2 = -.5 but b/c of the absolute value the answer would be .5 (you do the absolute value thing last). Using order of operations (remember Please Excuse My Dear Aunt Sally?), you take a + 8.5, so 1.5 + 8.5 = 10, and have -(b) so -(-2), the extra negative makes it positive (remember two negatives make a positive and a positive and negative together make a negative), so 2 + 1.7 (remember absolute value makes it positive 1.7) = 3.7. Then you take the 10 (from the first set of parenthasis) – 3.7 = 6.3 Those brackets [ ] around the secound set of numbers/letters work the same as normal parenthases, they just help you differentiate between the two. ((-b) + IcI) gets kind of confusing.

worked out:

(a + 8.5) – [(-b) + IcI]

(1.5 +8.5) – (2 + 1.7)

10 – 3.7

6.3

((1.5)+8.5) – [(-(-2))+I-1.7I]

= (1.5+8.5) – [2+1.7]

=(10) – 3.7

=6.3

|whatever value| means ABSOLUTE VALUE.

((1.5) + 8.5) – [2 + 1.7]

= 10 – 3.7

= 6.3 – final answer. 🙂