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Answers by Thomas E.

Let x = # dimes, then 24-x = # of quarters   10(x) + 25(24-x) = 435  and solve for x   10x + 600 - 25x = 435   -15x = -165   x = 11 = dimes, 13 quarters

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...