I think it is equalivilent to the number 607
Because d is the letter for 500
and c is 100
V is 5
and I is 1
so in total is 607
x = - 6 and x = 7
given x² - x - 42 = 0 ← quadratic in standard form
(x - 7 )(x + 6) = 0 ← in factored form
equate each factor to zero and solve for x
x - 7 = 0 ⇒ x = 7
x + 6 = 0 ⇒ x = - 6
The rate is 9(units of y) per (unit of x).
A Pythagorean triple consists of three positive integers a, b, and c, such that a2 + b2 = c2. Such a triple is commonly written (a, b, c), and a well-known example is (3, 4, 5). If (a, b, c) is a Pythagorean triple, then so is (ka, kb, kc) for any positive integer k.