This has exactly two solutions.
You can find the number of a solutions that a problem has by its highest power of x. Since x is raised to the 2nd power in here, it has two solutions. In some cases, these solutions will be irrational, double roots, or non-real, but there will still be two of them regardless.
Your equation is in the form
y = mx + b
4 = 8x - 48
Can you solve for x now?
About 1407 sharks would be needed to have a margin of error of 0.25
<h3>What is
margin of error?</h3>
Margin of error is used to determine by what value there is deviation from the real value. Margin of error (E) is given by:

The 90% confidence level have a z score of 1.645. Hence for E = 0.25, standard deviation = 5.7 feet, hence:

About 1407 sharks would be needed to have a margin of error of 0.25
Find out more on margin of error at: brainly.com/question/10218601
Answer and Step-by-step explanation:
samuel---> 1pc+3dr=36.75
sebastian--->3pc+12dr=138
1pc+4dr=46
1pc+4dr=46
1pc+3dr=36.75
so 1 dr=46-36.75=$9.25
4dr is 9.25×4=37
so 1 pc=46-37=$9.00