Provide an appropriate response.The expression (3 + 5) ÷ 2 contains parentheses. Are they necessary? Explain.

What will be an ideal response?


Yes. Without the parentheses 5 would be divided by 2, then that answer would be added to 3.   and .

Mathematics

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Provide an appropriate response.A chemist has two solutions that contain different concentrations of hydrochloric acid. One is a 20% concentration and the other is a 12% concentration. How many cubic centimeters of each should he mix to obtain 100 cc with a concentration of 15.2%?

What will be an ideal response?

Mathematics

Write the vector u as a sum of two orthogonal vectors, one of which is the vector projection of u onto v, projvu .u = , v = 

A.  + 
B.  + 
C.  + 
D.  + 

Mathematics

Write the number in decimal notation without the use of exponents.4 × 10-4

A. 4000 B. 40,000 C. 0.004 D. 0.0004

Mathematics

0.55 mi is 8% of what amount? 

A. 6.875 miles B. 12.852 miles C. 14.545 miles D. 1.575 miles E. 10.710 miles

Mathematics