Answer:
you just make the x values the y values and the y values the x values
Step-by-step explanation:
for example, the inverse of (1,-3) is (-3,1)
The answer to the equation is X=1/5
Answer:
Jacks scores 130 points
Jill scores 75 points
Step-by-step explanation:
J=Jacks score
K=Jills score
2K-20+K=205
So, we can do 3K-20=205
+20 +20
(cancel it out)
and we are left with 3K=225 which is K=75, so we do do 205-75=130(which is jacks score). To prove this we can do 75x2=150-20=130
You haven't shared the list of expressions from which you are to choose an answer.
However: you can perform this estimation yourself as follows:
Round off both -21.87 and 4.79. -21.87 goes to -22 and 4.79 to 5. Then
a good estimate of -21.87 divided by 4.79 would be -22/5, or -4.4.
These are the important trigonometric relations to base on:
cot (x) = 1/tan(x)
sec(x) = 1/cos(x)
csc(x) = 1/sin(x)
Following these properties, we could simplify the equation and input into the calculator to determine the exact value.
<span>tan40/cot50 = tan40/(1/tan50) = tan40tan50 = 1
</span><span>sec55/csc35 = (1/cos 55)/(1/sin 35) = sin35/cos55 = 1</span>
