Notice that

, so

Then taking the positive square root gives

so
and
.
9x^2 -c =d
add c to each side
9x^2 = c+d
divide by 9
x^2=(c+d)/9
take the square root on each side
x = +- sqrt ((c+d)/9)
simplify
x = +- 1/3 sqrt (c+d)
Answer: 1/3 sqrt (c+d), - 1/3 sqrt (c+d)
Answer: 80 and 6x
Step-by-step explanation:
10 x 8 = 80
2x times 3x = 6x
0.27
so three divided by eleven is 0.27272727272727272727272727272727........so on and so forth.
C =7
d is 6 times c+3
d=6c+3
d=6d+3 is equation
(if you sub, you would get 45 is weight)