X^2 = 73 - y^2
<span>x^2 - y^2 = 55 </span>
<span>substituting in to it </span>
<span>73 - 55 = 2y^2 </span>
<span>18 = 2y^2 </span>
<span>y = 3 </span>
<span>x^2 - 73 - 9 </span>
<span>x = 8 </span>
<span>answer is A</span>
Answer :36 explanation: (39x39)-(15-15)=1296 then square root that and get 36
Answer: He earns $169 after 13 hours
Step-by-step explanation:
To solve this we need to find out how much he earns per hour.
This can be identified using simply division.
130/10=13
He earns $13 per hour.
Now we multiply 13*13=169
He earns $169 after 13 hours
X+3=-1 => x=-4
x+1=-5 => x=-6
x-2=-6 => x=-4
x-9=-13 => x=-4
So the different one is x+1=-5. Have a nice day!! ^^
Do you want a general solution or from 0 <= x < 2pi?
tan^2(2x) - 1 = 0
tan^2(2x) = 1
Take the square root of both sides,
tan(2x) = +/- 1
Two equations:
tan(2x) = 1
tan(2x) = -1
Solve each equation.
tan(2x) = 1, 2x = {pi/4, 5pi/4, 9pi/4, 13pi/4},
x = { pi/8, 5pi/8, 9pi/8, 13pi/8 }
tan(2x) = -1, 2x = { 3pi/4, 7pi/4, 11pi/4, 15pi/4 },
x = { 3pi/8, 7pi/8, 11pi/8, 15pi/8}
So for solutions within [0, 2pi),
x = {pi/8, 3pi/8, 5pi/8, 7pi/8, 9pi/8, 11pi/8, 13pi/8, 15pi/8 }