8x1/2÷-2/3. the negative 2/3 is only on the 2 not the whole fraction. plz explain how do you get this answer plz.

3x + 4y = 5 x- 3y = -7 solve by substitution

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.

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