Hello,
You don't know (a-b)(a+b)=a²-b²?
(-3)²=9
(5i)²=-25
Answer 9 +25=34
Answer:

Step-by-step explanation:
1. Use the distributive property
5 ( x - 7 ) = 6 ( x + 2 ) → 5x - 35 = 6x + 12
2. Subtract 5x from both sides of the equation
5x - 5x -35 = 6x - 5x + 12 → -35 = x + 12
3. Subtract 12 from both sides
-35 - 12 = x + 12 - 12 → -47 = x
4. So, the answer is

Answer:
1. 0.05 is 5%
2. 0.78 is 78%
3. 1.39 is 139%
4. 0.6 is 60%
5. 3.08 is 308%
6. 0.2 is 20%
7. 0.67 is 67%
8. 2.8 is 280%
Step-by-step explanation:
To find the percent if the decimal is given, you have simply multiply the decimal by 100. So,
1. 0.05 is 5%
2. 0.78 is 78%
3. 1.39 is 139%
4. 0.6 is 60%
5. 3.08 is 308%
6. 0.2 is 20%
7. 0.67 is 67%
8. 2.8 is 280%