John buys 100 shares of stock at $\$100$ per share. The price goes up by 10% and he sells 50 shares. Then, prices drop by 10% and he sells his remaining 50 shares. How much did he get for the last 50?

Given f(x) = $-3x^{2} + 4x + 1$, evaluate f(2).

Simplify the given expression. 9(9 − 10r) + (−8 − 2r)

How many degrees form a right angle like noon to 3 pm on a clock?

Solve the equation. 4.3x − 0.7(x+ 2.1) = 8.61

In the week that ended June 19, the U.S. commercial crude oil inventory decreased by 3.8 million barrels. Now if the inventory was 353.9 million barrels in the week that followed, what was the U.S. crude oil inventory before the decline?

In the United States Patent & Trademark Office, 6000 examiners are faced with a backlog of 770,000 unexamined, new applications for patents. For each of these 6000 examiners, how many applications do they need to catch up on? Round the answer to the nearest tenth.

In Napa Valley, California, 1 acre of good wine land can produce some 3.5 tons of high-quality grapes. When the average price is $\$3,414$ for premium cabernet per ton, what would be the amount of money that could be generated on 1 acre of premium cabernet farming?

Round 29.379 to the nearest tenth.

Simplify the expression: 8(7x+ 8)

Translate the phrase into a mathematical expression: “6 times the sum of the number n and 3”

On his first 3 exams, Bob scored 79, 54, and 61. What score must Bob have on the fourth exam to come to an average of 71 for all of the four exams?

Solve the given equation for x. 14x = 84

Simplify the given expression. $(4-2)^{2}-(7-2)^{3}$

Round the number 304,059,724 to the nearest hundred thousand.

Translate the phrase into a mathematical expression “4 less than 11 times the number x ”

Diver number one dives down 25 feet below sea level. Diver number two then goes down five (5) times further than diver number one. What is the final depth of diver number two?

Round the number 2,358 to the nearest ten.

The number −6 is 2 more than an unknown number. Find the unknown number.

The sides of a triangle are equal to integral numbers of units. Two sides are 4 and 6 units long, respectively; what is the minimum value for the triangle's perimeter?