ElectricPavlov

Amplitude =   (hi-lo )/2  = 10/2 = 5 in

period = 12 sec     2pi/12 = pi/6

sine wave

5 sin (pi/6 x)

G'Luck....I hope it is getting clearer to ya !

Velocity = how far, how fast=  distance/time =   (10 laps * 1mile/lap)  /  250 s  = 10 miles/250 s = .04 mile/s =  144 mile/hr

Is the man rowing a boat full of scouts?

   the velocities would add      14 + 5 = 19 mph relative to the bank

Here is what it should look like:

5 laps  *  400 m/lap   /  9 minutes = 222.22 m/min = 3.7 m/s

slope = y1-y2   /   x1-x2

    = 6- -2  /   -2-  -4

    =8 / 2  =4

y=mx+b form

y = 4x + b      Sub in one of the points to find b

6 = 4(-2) + b

b = 14

y = 4x+14      when x = 0     b is the y intercept = 14

First one:

Take square root of both sides of the equation to get

x^2 - 82 = = 18  or  -18

x^2 =  100    or   64

x= + or - 10    or  + - 8        -10,-8,8,10

Second one

x^2+6x-16=0  factor

(x-2)(x+8) = 0                   so x = 2 or -8       -8 is the smallest

Third one

 (x+6)^2 = -25

x+6 =    -5i     5i 

x = -6-5i     -6+5i

Just sustitute in and do the math.....

P = 2(7.9) + 2(12.4)      and round to tenth...

       15.8   +  24.8

         40.6 cm

5C + 4B = 216     and

5C + 2B = 138     Subtract 2nd equation from first

        2B = 78    B=39

5C + 2(39) = 138

5C= 60        C = 12

(x+5)^2 = 34