7/20 + (-11/12)

I I had 77/220 and that was wrong. I cant figure this out.

There are two thousand girls and one thousand boys at a university. For every girl with glasses there are two boys who were glasses. 20 percentage of all students were glasses. how many boys were glasses?

What expression is equivalent to 4/7+1 1/3

Christopher jogged for 1 h and 24 min. How many seconds did he jog?

What is the result of converting 35 ounces into pounds remember that 1 pound equal 16 ounces

Box contains 4 bolts. two of them, labeled #1 and #2 are 5 mm in diameter, and two of them, labeled #3 and #4, are 7 mm in diameter. bolts are randomly selected until a 5 mm bolt is obtained.

Homer has 24 more marbles than lisa. lisa has 105 more than bart. if the three of them have 324 marbles in total, how many marbles does each of them have?

Angelica solves the system { x + y = - 3. x - y = 1 } and finds the solution (1, 3). Use substitution to explain whether Angelica's solution is correct.

What is the main advantage of using money instead of bartering? A. Many more people today use money than bartering to get goods and ervices. B. Not all countries use the same types of money in their economies C.

You have enough wallpaper to cover 240 square feet. If your walls are 8 feet high, what wall length can you paper?

How to solve 29+d=54; 24,25,26