Q. If kj=54, which of the following correctly expresses k in terms of j ?Choose 1 answer:(A) k=5j4(B) k=4j5(C) k=54j(D) k=45j
Given equation: We are given the equation kj=54. To find k in terms of j, we need to solve for k.
Multiply by k: Multiply both sides of the equation by k to get rid of the denominator on the left side: k×kj=k×54.
Simplify equation: This simplifies to j=54k because the k's cancel out on the left side.
Isolate k: Now, to solve for k, we need to get k by itself on one side of the equation. We can do this by multiplying both sides of the equation by 5 and then dividing by 4.
Multiply by 5: Multiplying both sides by 5 gives us 5j=4k.
Divide by 4: Now, divide both sides by 4 to isolate k: 45j=k.
Final expression: We have now expressed k in terms of j. The correct expression is k=45j, which corresponds to answer choice (D).
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