how do you solve the equation - 8-3+8 + (-3) and other questions of this structure, I got this from Kahn Academy: 7th grade math, adding and subtracting negative numbers

Expand the expression. 2x2 (x + 3) (x-2)

Find the sum of the first 12 terms of the sequence. show all work for full credit. 1,-4,-9,-14, ...

Where is fluid pressure greatest? A. 30 centimeters below the surface of a swimming pool B. 1 meter below the surface of a swimming pool C. 2 meters below the surface of a swimming pool D. The pressure is the same in all parts of the swimming pool.

The formula i = prt gives a simple interest / earned on an account where the amount is p is deposited at an interest rate r for a certain number of years t. Use the table to order the accounts from least to greatest interest earned after 5 years.

The length and breadth of a room are in the ratio 3:2. The cost of carpeting the room at Rs25 per sq. m is Rs1350 and the cost of papering the four walls at Rs 15 sq. m is Rs 2580. If one door and two windows occupy 8 sq.

Two accounts each begin with a deposit of $5000. Both accounts have rates of 5.7 %, but one account compounds interest once a year while the other account compounds interest continuously.

Blue whales eat an average of 5,000 pounds of fish daily, with a standard deviation of 850 pounds. Approximately what percentage of blue whales eat more than 7,550 pounds of fish? 15.87% 5% 0.3% 0.15%

A car travels 450 miles in the same time that a motorcycle travels 390 miles. if the car's speed is 10 miles per hour more than the motorcycle's, find the speed of the car and the speed of the motorcycle. the speed of the motorcycle is ___ mph.

How many gallons in a 100 lb propane tank?

What is the quatient of (*3+6*2+11*+6) : (*2+4*+3