Ruby bought 15 cell phone cases for a total of $145.80. she sells them for $19.50 each, but she is only able to sell 5 of them.
1 answer:
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First I converted the equation terms into sine and cosine.
Substitution:
Common Denominator Created:
Multiply each term by the LCD:
Substitution: Recall ⇒
Distribute and collect all terms on one side:
Factor and set each factor equal to 0:
The 2nd factor provides only possible answer 109.5 degrees
You've got 3 values there.
Get the sum of 65, 30 and 25 and divide their sum by the number of values that exist, which in this case is 3.
Answer:
40
Get the sum of 65, 30 and 25 and divide their sum by the number of values that exist, which in this case is 3.
Answer:
40