CPhill

Time = D/R   ....so we have

Time = 1.2miles / [3miles/hr]  = [1.2/3] hrs. = [12/30]hrs = [24/60]hrs = 24 minutes

The side of the square mirror = √256 = 16 in

The area of the rectangular mirror will be  (16)(16 + 2)  = (16)(18) = 288 sq. in.

No. of People            Cost

1                             9.50

2                            19.00

3                            28.50

4                            38.00         

          etc.

If we divide the cost in each row by the number of people in that row, we always have the proportion (ratio) of 9.50 / 1

Note, Anonymous.....

m = -3n + 7    is the same thing as   m = 7 - 3n    ......

1/3(x-2)=3  multiply both sides by 3  to clear the fraction

(3)(1/3)(x - 2) = (3)*3

x - 2 = 9    add 2 to both sides

x = 11

6.7 x 70 = 469 miles

This means that we want the thing we are "solving for" on one side of the equation and everything else on the other....so we have

m+3n = 7       subtract 3n from both sides

m = 7 - 3n

And that's it !!!

-6+12<-22 

6 < -22  

This is false

cot Θ = x/y = 4/7

tan Θ = y/x = 7/4

For the rest of the identities we need to find "r"....this is given by  √[x^2 + y^2]  =  √[4^2 + 7^2]  = √65

So

sin Θ  = y/r = 7/ √65    

cosec Θ  is the reciprocal of the sine = √65/7

cos Θ = x / r  = 4/ √65

sec Θ is the reciprocal of the cos = √65/4

Pi is an irrational number that does not "terminate".....and any multiple of an irrational doesn't terminate, either........thus, 28pi  is non-terminating