Answer:
The Basic Identities are :



So for this question :




Answer:

Step-by-step explanation:
<u>Step 1: Distribute the plus</u>
<u />

<u>Step 2: Combine like terms</u>
<u />



Answer: 
Answer:
2/5
Step-by-step explanation:
3/5 * 2/3
Rewriting
3/3 * 2/5
The 3's cancel
1 * 2/5
2/5
.87 is correct you can always check your work with an online calculator. :)
Answer:
Turn off battery supply → The electromagnet turns off.
Place a magnet care inside the coil of wire → The strength of the electromagnet increases.
Change the direction in which the current flows → The poles of the electromagnet reverses