(y + 7)(y + 7)
49 is a perfect square of 7
it can also be written
(y + 7)²
hope this helps :)
Surface area: S
radius: r
diameter: e
time: t
[dS/dt] = [dS/de]*[de/dt] => de/dt = [dS/dt] / [dS/de]
S = 4pi*r^2 = 4p*i(e/2)^2 = pi*e^2 => dS/de =2pi*e
dS/dt = 7cm^2 / min
de / dt = [2pi*e] / [7cm^2/min] =[7cm^2/min] / [2pi*10cm] = 0.11 cm/min
Answer:
Step-by-sThe standard form is Ax + By = C
with A being both positive and non-fraction
so we are given 3x - 9 = 7y
we add the 9 to both sides
3x = 7y + 9
and subtract the 7y from both sides
3x - 7y = 9
tep explanation: