Find the LCD for the fractions in the list. , 

A. 63x2
B. 63x3
C. 7x3
D. 63x5


Answer: B

Mathematics

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Solve.A boat moves 28 km/h in still water. It travels 80 km upstream and 80 km downstream in a total time of 7 hours. What is the speed of the current?

A. 8 km/h B. 12 km/h C. 10 km/h D. 9 km/h

Mathematics

Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.x-8 x6

A. x2
B. -x2
C. - 
D.

Mathematics

Determine whether the graph is that of a function.

A. function B. not a function

Mathematics

Solve the problem.Two separate tests are designed to measure a student's ability to solve problems. Several students are randomly selected to take both tests and the results are shown below. Find the equation of the least-squares regression line that models the data.

A. y ? 0.930 - 19.4x B. y ? 19.4 + 0.930x C. y ? -0.930 + 19.4x D. y ? -19.4 - 0.930x

Mathematics