What is the best first step for solving the given system using substitution while avoiding fractions? 2x+6y=7 6x+18y=24 a. solve for x in the first equation. b. solve for y in the first equation. c. solve for x in the second equation. d. solve for y in the second equation.

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

The owners of four companies competing for a contract are shown in the table below. if a report is released that advocates company b, which of the people having funded the report should result in the most skepticism? company owner of company company a jake adams company b company c company d debby smith henry rose rhonda baker o a. jake adams o b. rhonda baker o c. debby smith o d. henry rose

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.