Which is an equivalent expression for 4(x + 7) – 9 4x - 2

4x +16

4x + 19

4x - 19

Which expression gives the exact value of x?

Which has the greater energy, light of wavelength 519 nm or light with a frequency of 5.42 x 10^8 sec^-1?

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample