Exam 2: Review and Applications of Algebra

Rearrange formula (6-2) to isolate r on the left side.

Evaluate the following:

Evaluate the following expression for the given value of the variables and calculate to the cent: for S = $2500, r = 0.085,

Perform the operation indicated and collect like terms:

Simplify:

Simplify:

Solve for x to five-figure accuracy:

Solve the following pair of equations to three-figure accuracy. Verify your solution. 37x - 63y = 235 18x + 26y = 468

Facebook had 65,704,000 unique visitors in February of 2009. This number represented a 228.2% growth over the corresponding number for February 2008. Rounded to the nearest 10,000, what was the absolute increase, year-over-year, in the number of unique visitors?

Solve each of the following pairs of equations to three-figure accuracy.

Use formula (4-2) to calculate d2 if N = $324.30, L = $498, d1 = 0.20, and d3 = 0.075.

Use formula (6-1) to calculate P if r = 0.05, i = $6.25, and t = 0.25.

Solve the following equation: 29 - 4y = 2y - 7

Solve for the unknown variable:

Last year, Canada's exports to the U.S. exceeded imports from the U.S. by 23%. By what percentage were the United States' exports to Canada less than its imports from Canada?

Perform the operation indicated and collect like terms:

Simplify and collect like terms:

Simplify, collect like terms and maintain 5-figure accuracy:

Solve the following pair of equations to three-figure accuracy. Verify your solution. 0.03x + 0.05y = 51 0.8x - 0.7y = 140

Solve the following equation accurate to the cent: