ElectricPavlov

30 tens  =   30  x  10  = 300      How many hundreds?

Guess:     5 * 21  / (26*25)   * 260 = 42 times  ?

At 2:00 P.M. a train A leaves a station traveling at 100 mi/hr. At 4:30 P.M. train B leaves the station on a parallel route and traveling at 150 mi/hr. How far away from the station will the second train overtake the first train?

Train A has a 2  1/2 hour head start     2 1/2 hr  x 100 mph = 250 m   head start

Train B travels (150 - 100) m/hr =   50 m/hr faster

   Start by finding how long it will take train B to cover the 250 mile gap at 50 m/hr

        now you will know how long train B has been travelling when it catches train A  

              then  rate   x  time  = distance from station

                   150 m/r    x time = distance

You should at LEAST try to solve ALL of these before postin all of your homework.....If you cannot even attemp them, you are in a clas too far advanced for your knowledge level and should be getting some remedial education.....

   THIS FORUM IS NOT FOR DOING YOUR HOMEWORK FOR YOU......sTOP BEING LAZY.   AT LEAST TRY !       THEN POST YOUR q'S

The entire window is  48 x 36 = 1728 in²

    ^{made up of 24 triangles     each triangle (which is shaded region) =   1728/24 = 72 in^2}

1B + 1C = 5.60

2B + 3C = 12.55         two equations, two unknowns......solve for B      Multiply 1st equation by -3 to get:

-3B-3C = -16.8            Now add 2nd and third equations to get:

-B = -4.25

B=4.25                 Done !  

Total soln = 60ml    0f 5 %   

Volume of 3% = x      then the remainder,   60-x   is the 8% solution

      total of constituents = total of final solution

.03 x    +  .08 (60-x)   = .05 (60)        solve for x the amount of 3% needed.....then the amount of 5% needed is 60 - x    

https://web2.0calc.com/questions/please-help_29935#r1

81 =     8.1 x 10¹

81 =   3 x 3 x 3 x 3 = 3⁴

decibel      db    

Instead of being all wordy:

x = adult tx      revenue from adult tx =    12 x

98-x = senior tx    revenue from senior tx = 8 (98-x)     summed together these equal 1072

12x     +    8 (98-x)  =  1072       solve for x = adult tix     then   98-x = senior tx