y = - 4
collect terms in x
xy + 4x = 1 - 20 = - 19 ( factor out x )
x(y + 4 ) = - 19 ( divide both sides by ( y + 4) )
x =
x will be undefined if the denominator of the fraction is zero
y + 4 = 0 ⇒ y = - 4
x has no solution for y = - 4
Answer:
c
Step-by-step explanation:
you're dividing 1/2 (soda) into 8 parts
Answer:
A's radius is half so multiply it by 2 to get the diameter which is the same as B's.
Step-by-step explanation:
Answer:
, in degrees
Step-by-step explanation:
The secant of an angle is given by:
In this question:
So
In the first quadrant, the angle that has cosine of 1/2 is 60º.
The cosine is negative in the second and in the third quadrant.
The equivalent angle to 60º in the second quadrant is of 180º - 60º = 120º.
The equivalent angle to 60º in the third quadrant is of 180º + 60º = 240º
So the values of in the interval are:
, in degrees