16/26 / 1/4 =
16/26 * 4/1 = 64/26 simplify if you want
A-C-D = 7:11 = 7 + 11 = 18 'units'
A-B-D = 1:5 = 3:15 = 18 'units'
AB : BC : CD = 3 : ? : 11 ? = 18-11-3 = 4
3:4:11
A-B 30 k/hr 1.2d / 30k/hr = time
B-A 20 k/hr d / 20k/hr = time
2.2d / (1.2d/30 + d/20) =
2.2 / 1.2/30 + 1/20) = 24.4 k/hr
120 + 80 = 200 liters final solution
salt of ingrediaents = salt in final solution
.05 (120) + .15(80) = ? (200) solve for ? which is the final solution percentage (in decimal form)
1/8×√2=2n divide both sides of the equation by 2
1/16 sqrt2 = n
= sqrt2/16
-34 -17 0 17 34
Angle at C = 180 -124
Angle at B = 180 - 6x
Angle at A = 2x Summed, they equal 180
180 - 124 + 180 - 6x + 2x = 180 solve for x .......
First train travels at 48 mph from 8 to 10 am = 2 hours * 48 m/r = 96 miles
second train travels for 1 hour at 65 m/hr = 65 miles
96 - 65 = 31 miles apart at 10 AM
This is an EXPRESSION with TWO unknowns
to solve for x and y you will need TWO EQUATIONS relating x and y
somethinig (this is just an example) like:
32x + 54y - 4*x+ 84 = 88 AND x+2y = 17
Realize x- y + x+y = 180 solve for x
then use that value of x to find y with the following:
x-y + 2x-2y = 180 (because the ' x-y' and the '2x-2y' add to 180 degrees)
