Answer:
Given the system of equation:
......[1]
......[2]
we can rewrite equation [2] as;
......[3]
Substitute equation [3] into [1] to eliminate x, and solve for y;
Using distributive property: 
Combine like terms;
16 - 8y = -4
Add 4 to both sides we have;
20 - 8y = 0
Add 8y to both sides we have;
20 = 8y
Divide 8 to both sides we have;
Substitute the y-value in [3] we have;
x = 8 - 5 = 3
Therefore, the expression should be substituted into the first equation is, and also the value of x = 3 and y = 2.5
Answer:
150
Step-by-step explanation:
You have to divide the correct answers (111) by the total amount of questions (x) in order to find the 74% (0.74)
The degree of a polynomial is the highest power of the polynomial.
The polynomial is 
The degree is given as:
The zero is given as:
Add 3 to both sides
From the question, we understand that the polynomial has a single zero.
So, the polynomial is:
Substitute 4 for n
Hence, the polynomial is
Read more about polynomials at:
brainly.com/question/11536910
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