(n+5)^2=48
sqrt both sides
n+4=+/-4√3
minus 4 both sides
n=-4+/-4√3
-4+4√3>0 so this cannot be the value of n
n=-4-4√3
the number is -4-4√3
Answer:
(7, 5) no
(-6, -3) yes
(-5, 2) no
(1, -4) no
Step-by-step explanation:
For this question we have to input the x and y values into the equation: 2x - 9y = 15
For (7, 5) we would get 14 - 45 = 15 which is false so it is not a solution.
For (-6, -3) we would get -12 + 27 = 15 which is true so it is a solution.
For (-5, 2) we would get -10 - 18 = 15 which is false so it is not a solution.
For (1, -4) we would get 2 + 36 = 15 which is false so it is not a solution.
Answer:
y=a/(9+3x)
Step-by-step explanation:
Reverse: 9y+3xy=a
y(9+3x)=a
y=a/(9+3x)
