A science teacher ordered $3980 worth of microscopes and dissection kits for the new science lab. A total of 38
microscopes and 47 dissection kits were ordered. A microscope
costs four times as much as a dissection kit. Write a system of
linear equations that represents this situation. What is the cost
of each item?

What is the measure of x, in degrees

What are the solutions of the equation? 5z^2 + 9z - 2 = 0 a. 1, -2 b. 1, 2 c. 1/5, -2 d. 1/5, 2

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0