CPhill

(1/5)(4-3x) = -1      multiply both sides by 5 to clear the fraction

4 - 3x  = -5       subtract  4 from both sides

-3x  = -9              divide both sides by -3

x = 3

-3(2x+5)-6x  =

-6x -15 - 6x  =

-12x - 15

You are correct....!!!!

Apparently, I don't either.....LOL!!!!!

Just hit  shift  6  on your keyboard.

Also, the x^y   key on the calculator does the same thing.

5sqrt3, 7sqrt5) , (sqrt3, -sqrt5)  

Midpoint  =  [( 5sqrt(3) + sqrt(3) ) /2  ,   (7sqrt(5) - sqrt(5))/2  ]  =

[ 6sqrt(3)/2 ,  6sqrt(5)/2 ]  =

[ 3sqrt(3) , 3sqrt(5)  ]

Let the number of dimes = x

Then the number of nickels = x + 2

And the number of pennies  = 3x

And we have

10x + 5(x + 2) + 3x = 64     simplify

10x + 5x + 10 + 3x  = 64

18x + 10  =  64       subtract 10 from each side

18x  = 54         divide both sides by 18

x = 3    this is the number of dimes

x + 2  = 3 + 2  = 5     = the number of nickels

3x  = 3(3)  = 9   = the number of pennies

(1/2)^5 =  1/32

Surface area =

pi [ dh + (d/2)^2]     where h is the height and d is the diameter  ......so we have....

3.14  [ 21.25 * 18.25 + (21.25/2)^2]  =  about 1572.21 in^2

If m and b are both 0, the equation  is just     y = 0

(-3/4) x> -15/16 + (1/3)x   subtract (1/3)x from both sides

(-1/3)x - (3/4)x > -15/16

(-13/12)x > -15/16     multiply both sides by -12/13   and reverse the inequality sign

x < (-15/16)(-12/13)

x <  45/52