Answer:
z = -4/5
Step-by-step explanation:
5z + 7 = 3
5z = -7 + 3
5z = -4
z = -4/5
Hope this helps :)
Let me know if there are any mistakes!!
Answer:
The answer is "28, 35, 52, 65"
Step-by-step explanation:
Calculating the x,y:

When
or

So, the final answer is "28, 35, 52, 65".
If there is $1,000 for the pipes, then you can buy 5 steel pipes for $500 and to plastic for 500 too.
0.000038 = 3.8e-5 = 3.8×10⁻⁵