Answer:
The value of the x is 1/9.
Step-by-step explanation:
Data provided in the question is:

To find out:-
the value of x.
Solution for the equation:-

On solving the given question or equation by using mathematics of algebra we find out the value of x to be 1/9.
The first one is 154
The second one is 12.65^2
<u>answer:</u> 
<u>work:</u>
| subtract 5x and move it over to the 7x, and solve
| subtract 4 and move it over to the 10, and solve
| divide by 2
| final answer
hope this helps! ❤ from peachimin
Saw A = 150 planks/30 seconds = 5 planks per second
Saw B = 130 planks/ 13 seconds = 10 planks per seconds
5 + 10 = 15 planks per second total
225 planks / 15 planks per second = 15 seconds
Answer: 15 seconds
1. No; it is not written as a number times the power of 10.
2. 1.22×10^9
3. 2.87×10^−2
4. 5000
5. is answered in attached picture.
6. 3.212×10^3