40cd
12, 10, 8 and 6 (in descending order).Let the highest number equal a.We are told that ab - cd = 72However, as the numbers are consecutive even integers we also know that:b = a - 2c = a - 4d = a - 6thus we can use this to write the above equation in terms of only one variable, a, as:(a * (a - 2)) - ((a-4) * (a-6)) = 72(a2 - 2a) - (a2 - 10a + 24) = 72 (Remember that as we expand the second bracket in the next step we will multiply each term by the minus outside the bracket giving:)a2 - 2a - a2 + 10a - 24 = 72 (Now we can continue to simplify to get:)8a - 24 = 728a = 96a = 12Once we have a value for "a" we have a value for all the variables:a = 12b = 10c = 8d = 6As a proof, if we wish, we can substitute these values back into the original equation to get:ab - cd = 72(12 * 10) - (8 * 6) = 72120 - 48 = 72.
120 there the number
-8d + 8d = 0
It is a + 8d where a is the first term and d is the common difference.
An 8d nail is a type of common nail used in construction and woodworking, where "8d" refers to its size and weight classification. The "d" stands for "penny," a historical term that indicates the length of the nail, with an 8d nail measuring approximately 2.5 inches long. It is typically used for framing, attaching plywood, and other general carpentry tasks. The gauge of an 8d nail is usually around 0.131 inches in diameter.
11
8d = 5d+18 8d-5d = 18 3d = 18 d = 6
8d-3d =65 plus work
8D in Mathematics is a site offering classes in ABACUS Math.
d2 + 8d + 7 = (d + 7) (d + 1)
2d + 11e +8d + 11e = 10d + 22e
A ladies jinie! 8D
100b = 8d
8d