Elements, they’re a pure substance and can’t be broken down into simpler substances.
15) n+4
16) n-6
17) n+3
18)n-2
19)n+6
20) n-8
Answer:
-7
Step-by-step explanation:
Because zero is the x, so x=-7 then it's -7
Answer:
commutative property
Step-by-step explanation:
You switched the numbers inside the parenthesis, which in this case is 5 and -5.
The cost of one pencil is $10:8=$1.25
The cost of 20 pencils: 1.25 x 20 = $25
