X + 4 is the answer to your question
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Multiply 3 * 1 1/2 to find how many miles she runs per hour
1 1/2 * 3
3/2 * 3
9/2
4 1/2 She will run 4 1/2 or 4.5 miles per hour.
Answer:
740 mg of calcium is the correct answer
14 and 15
14^2 = 196
15^2 = 225
225+196 = 421
