Answer:
Write the equation in standard form:
.

Use the quadratic formula. <em>(+-) = </em>±

Substitute in the values, where a = 3, b = 4, and c = -20, and simplify.

Option D:
is the solution to the system of equations.
Explanation:
Given that the equations are
and 
We need to determine the solution of the system of equations.
The solution can be determined by solving the two equations.
Let us solve the system of equations using substitution method.
Consider the equation
, the value of y is given by

Substituting the value of
in the equation
, we get,

Simplifying, we get,




Substituting the value of
in
, we get,



Thus, the solution to the system of equations is 
Hence, Option D is the correct answer.
The median is the middle score, it is also the average of the two middle scores when total number is even.
original 3 scores: 89, 90, 95 ----> median = 90
with final score: 89,90,X,95 ----> median = 91.5
(90+x)/2 = 91.5
90+x = 183
x = 93
Final score was a 93.
Answer:
n>7
Step-by-step explanation: