Answer:

The answer is 10.

Step-by-step explanation:

3 + 6 = = 10

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Answer:

L= 4 + W

Area is 45, so

L times W = 45

substituting the value of L, we get (4+W)*W=45, after simplifying this we get

4W+W2=45

W2+4W-45=0, this is a quadratic equation and after solving this we get the factors 9 and -5

( W+9) and (W-5) = 0

after solving for W we get W=-9 or W=5, since width cannot be negative, so width = 5

Now substituting the value of W=5 in L = 4 +5, we get length = 9