Well, darling, "1.5 k" is just a fancy way of saying 1,500. The "k" stands for kilo, which represents a thousand. So, if someone says they have 1.5 k followers on Instagram, they're just bragging about having 1,500 followers.
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1.5 k is a shorthand way of expressing the number 1,500. The "k" in this context stands for "kilo," which is a prefix in the metric system denoting a factor of one thousand. Therefore, when you see 1.5 k, it means 1.5 multiplied by 1,000, resulting in 1,500.
They are elements of the infinite set of numbers of the form 15*k where k is an integer.
If you mean: kk-5 then it can be k^2-5 But if you mean: k+k-5 then it can be 2k-5
Kilogram
The phrase "varies directly as" means that there is a number k such that w = k(2x - 1). From the results given for w = 9 when x = 2, 9 = k(4 - 1), or k = 3. Then when w is 15, 15 = 3(2x - 1), or 15 = 6x - 3, or 6x = 15 + 3, or x = 18/6 = 3.
K is short for kilo, which means thousand, 5K is 5000.