1) How can we get System B from System A? System A: System B:
x+3y=−9 3x+4y=−9
2x+y=4 2x+y=4
A)Replace one equation with the sum/difference of both equations
B)Replace only the left-hand side of one equation with the sum/difference of the left-hand sides of both equations
C)Replace one equation with a multiple of itself
D)Replace one equation with a multiple of the other equation

2x^2+5x+17

your welcome. : )

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180

hello umm i don't understand your question can you explain it more pls

step-by-step explanation: