Q: Carla's teacher tells her that she needs to collect 30 leaves and 20 bugs for a project that's due in 10 days. How many items does Carla need to collect each day if she always wants to collect the same daily amount?
A: First find the total number of items Carla needs to find by adding the number of leaves to the number of bugs: 30 leaves + 20 bugs = 50 items. Now divide the total number of items by the number of days Carla has to do her assignment to find the daily collection amount: 50 items / 10 days = 5 items / day. The answer is 5.

Q: Maria's test scores are 80, 70, and 90. What score does she need to get on a fourth test so that her average score for the four tests is exactly 85?
A: She needs to have a total of 4 * 85 = 340 points over the four tests. She has 80 + 70 + 90 = 240 points so far. She needs 340 - 240 = 100 on the fourth test. The answer is 100.

Q: Nick has 35 quarters. 2/5 of the quarters are state quarters, and 50 percent of the state quarters are Pennsylvania. How many Pennsylvania state quarters does Nick have?
A:
State quarters:35(2 / 5) = 14 quarters. Pennsylvania:14(.50) = 7 quarters. The answer is 7.