Answer:
2<k
Step-by-step explanation:
20 < k + 18
20 - 18 < k + 18 - 18
2<k
Q16- 3/2 (slope = rise over run) Lmk if you need a further explanation

The multiples of 105 are 3,5,and 7 so none of them can come out of the square root so it cannot be simplified.
This is a ratio problem; the ratio of the length to width is constant (and therefore equal):
4 /6 = 15 / x
Now, with a ratio, we may do any allowable algebra operation: cross-multiply, invert both sides, multiply or divide both sides by the same amount, etc.
Let's cross-multiply:
4x = (15)(6)
x = 90/4
x = 22.5 in.