6)
What is the result of adding 20 to -20?
A)
-40
B)
-20
0
D)
40

Zero

Step-by-step explanation:

This is called additive inverse

: a number that when added to a given number gives zero the additive inverse of 4 is −4 

so the answer will be zero

0 is the answer

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An art school orders 20 charcoal pencils for each student in a portrait class and 26 extra pencils in case more are needed.

Let s represent the number of students in the class and c represent the total number of charcoal pencils the school orders.

Find the value of c when s=4.

c=

Step-by-step explanation: