ElectricPavlov

Just use the calculator on this site !

30000/7 = 4285.7142857142857143

rate x time = distance      distance/rate = time

x / 100% = 3      x = 300

300/120% = ?      

300/120 = 2.5 hours 

yes    ax +by = c is just another form of y = mx + b  equation for a line     Good call!

TAN = opp/adj    opp is the height above him .....

added to his building height and the 6 foot transit will give the other building height

tan 12 = opp/245     opp = 245 x tan12 = 245*tan(12 = 52.07635760915   then add building and transit height                 + 54  +6 = 112.076 ft tall

Then you will have to graph it    or show that it cannot be put into   y= mx+b form

[288 mod 8 ]*6 = 0    Soall of the carts have the same amount

288/8 x 6 =0288/8*6 = 216 pounds on each cart

A,B,C are all liear and can be put into the line form of  y= mx+b 

D is a quadratic...a parabola because of the exponent

It is the same as MULTIPLYING by 10^(-n)

If a number is increased 30% it becomes 130% of the original number

x *130% /100% = 260    Multiply both sides by  100%/130%

x = 260 * 100/130 = 200 = the original number

Number of unit sold will be    60 - (x-800)/20   where 'x' is the amount over cost

income will be   [60-(x-800)/20] * x   = [60-x/20 + 800/20] *x = 60x -x^2/20 +40 x

= -x^2/20 +100x 

Maximum will occur at  - b/2a      b = 100 a = 1/20     

       -(100/(-2/20) )= $ 1000  over cost will  maximize profit