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Answers by Thomas E.

y=2x+3; y=4x-1 (answer)

Since y = y, 2x+3 = 4x - 1   2x = 4   x = 2, substitute it in and y =7

Use cross multiplication:   19(5x-1) = (4x+1)(9x+1)   95x - 19 = 36x2 + 13x + 1   36x2 - 82x + 20 = 0   18x2 - 41x + 10 = 0  solve with the quadratic formula   [41 +/- √(412 - 4(18)(10))]/(2(18)   (41...

Let x = the length of the square cut out of each corner.  Then the length/width of our box is 18-2x.  To find volume we use LxWxH or:   (18-x)(18-x)(x) = x3 -36x2 + 324x  Take the first derivative and set it equal to zero to mind the critical values:   3x2...

40p + 55 = 695 (answer)

To solve an equation, you need to isolate the variable on one side:   40p + 55 = 695  First subtract 55 from each side   40p = 640  now diveide both sides by 40   p = 16