If 9(x - 9) = -11, then x = ?

单项选择题(a + 2b + 3c) - (4a + 6b -5c) is equivalent to:

单项选择题What is the area of the stained-glass panel, to the nearest 0.1 square foot?

单项选择题If the average of four numbers is 4, and if the number 6 is added to these four numbers, what is the average of all five numbers?

单项选择题As production coordinator, Elizabeth was ------- for the supervision of the final stages of assembly and of overall product quality.

单项选择题Glacier Inc. is anticipating that its new line of climbing gear will improve its ------- in the outdoor sports gear market.

单项选择题Employees of a discount appliance store receive an additional 20% off of the lowest price on an item. If an employee purchases a dishwasher during a 15% off sale, how much will he pay if the dishwasher originally cost $450?

单项选择题Solve the following equation for A : 2A 3 = 8 + 4A

单项选择题Suppose that, in each trial, either electrons or protons had been added to each sphere to produce its charge. In Trial 3, which of the 2 types of particles would have been added to Sphere X, and which of the 2 types of particles would have been added to Sphere Y ?

单项选择题Suppose that Sphere X had become unfastened from the floor of the vessel during Trials 1 and 7. During which of these trials would Sphere X more likely have undergone the lesser amount of acceleration?

单项选择题Based on the chemical equation in the passage, in a ZAB, as 5 02 molecules are consumed, how many Zn atoms, if any, must also be consumed?