Answer:
∠ A ≈ 48°
Step-by-step explanation:
Using the Cosine rule to find an angle
cosA = 
with a = 10, b = 13 and c = 11
cosA = 
= 
=
, thus
A =
(
) ≈ 48° ( to the nearest degree )
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➷ K - 2L = L - M
Subtract L from both sides:
K - 2L - L = -M
Add M to both sides:
K - 2L - L + M = 0
Add 2L to both sides:
K - L + M = 2L <== this is the answer
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↬ ʜᴀɴɴᴀʜ ♡
Start by finding 7% of the $23.20:

Now add this to $23.20:

Now, let's find 18% of this new total with tax to find the tip amount:

This is the tip amount. And finally, let's add this to the 24.824:

Not sure if you were given any instructions about rounding, but Ana's cost will be around $29.29.
Hope this helps.