Answer:
k= -6.48 approx
Step-by-step explanation:
(5k+35) -8=12
opening bracket
-45k-280=12
-45k=12+280
-45k=292
k=-6.48 approx
Answer:
If XY = -1 then Y = -1 / X
Substitute the given values of X into the above formula and solve for Y:
X = 1 ⇒ Y = -1
X = -1 ⇒ Y = 1
X = 1/2 ⇒ Y = -2
X = -1/2 ⇒ Y = 2
X = 1/3 ⇒ Y = -3
X = -1/3 ⇒ Y = 3
Additional points:
X = 2 ⇒ Y = -1/2
X = -2 ⇒ Y = 1/2
If X = 0 then Y = 1/0 which means the function is undefined, therefore the curve will get close to Y = 0 (y-axis) but will not touch it.
If Y = 0 then 0 = -1/X which is impossible, therefore the curve will get close to X = 0 (x-axis) but will not touch it.
From the graphs you can see that the graph of the line
lies under the graph of the line
. Then all solutions of unequality
are solutions of unequality
, but not all solutions of unequality
are solutions of unequality
.
For example, if x=1, y=-2
.
Answer: Correct choice is B.