10x+4=8 subtract 4 from both sides of the equations
10x +4 -4 = 8 -4
10x = 4 divide both sides by 10
x = 4/10
x = 2/5 or .4
1 63/100
x = bike time 6-x = walk time
44x + 4 (6-x) = 164 solve for x (He bikes at 44 mph! Wow! )
Use distance formula to find the distance between the two points....this is the side length of the square....then area = side X side
d^2 = ( -1 -2)^2 + ( 4 - -8)^2 solve for d ( the side length)
x = original amount
x - 1540 amount after sofa purchase
spending 1/5 means 4/5 is left
4/5 ( x - 1540) and this equals 1/4x
4/5 (x - 1540) = 1/4 x Now, just solve for 'x' ......
8/9 n = 2/3 s
s = 4/3 n
n+s = total number
n / (n + 4/3 n) = Nadia fraction of total
n / 7/3 n
Nadia fraction = 3/7
6 X 4 X 8 X 7 = ____________ ways
6/(6+11)= 6/17ths are professors 6/17 * 136= 48 profs
.03 (60) = .018 ( 60 + w) solve for 'w'
4700 / (a-w) = 5 9520 / (a+w) = 7 <===== re-arrange to solve for 'a' : (9520-7w) / 7 = a = 1360 -w
Sub in the red equation for 'a' then solve for 'w' :
4700/ (1360-w - w) = 5
w = 210 km/hr
a = 1360 -210 = 1150 km/hr
