Answer:
The first one
Step-by-step explanation:
the first one is biased because it is not random but rather people who are using the library. They will obviously be biased towards the library
Answer:
Step-by-step explanation:
(1 - 3)/(3+4) = -2/7
answer is C
Answer:
(4,-3)
Step-by-step explanation:
The intersection of the 2 lines is the solution of the system of equations. The lines intersect at the point (4,-3), so that ordered pair is the solution.
Answer:
50m
Step-by-step explanation:
let the width be x
length=3x
3x+3x+x+x=400
8x=400
x=400÷8
x=50
Answer:
a= 1
b= -1
c= 3
Step-by-step explanation:
''a'' and "b" are the coefficients of x^2 and x respectively, where "c" is the constant number.
When solving a quadratic equation all the variables and constants should be on one side, in this case: x^2 -x +3=0.
Here the coefficient of x^2 is one, of x is -1 and constant is 3.