Challenging+Questions

= Challenging Questions=


 * This is the page on which to place all **challenging questions** (instead of in the discussion posts) so that all of this type of question are on one page for those interested. Remember to leave a signature with your username in square brackets and a horizontal line between each question.
 * Answer these questions on the Challenging Questions (Answers) page


 * Challenge Question #1**

Find a number which decreased by 18 is 5 times its opposite.

[pjvasdev]


 * Challenge Question #2**

A vendor sells hot dogs, hamburgers, and sausages. A customer buys 4 hot dogs, 5 hamburgers, and 4 sausages for $300.66. The price of a hot dog is $12.00 more than the price of a hamburger. The price of a sausage is $2.00 less than the price of 5 hamburgers. Find the cost of each item.

[kevink2435]


 * Challenge Question #3**

If Kevin earns $132/ 9h, how much does he earn in 20h?

[kevink2435]


 * Challenge Question #4**

Brandon works in a shoe-selling store. He earns $1299/week, plus a commission of 20% of his sales. a) write the partial variation equation to describe his earning in one week. b) Graph this equation c) Using the pattern that you just found in the graph, if Brandon earned $100 000 000 in one week, what is the total value for all the shoes he sold?

[kevink2435]


 * Challenge Question #5**

The formula for volume is: V=lwh. Is this equation a direct variation or a partial variation? Explain your reason.

[kevink2435]


 * Challenge Question #6**

Write 3²+3²+3² as a power of 3.

[kevink2435]


 * Challenge Question #7**

In 2007, the number of students in a school is 80 more than the number of staff members. In 2012, the number of students decreased by 25% and the number of staff members increased by 20% causing the number of staff members to exceed the number of students by 30.

a) What is the rate of change for the students? b) What is the rate of change for the staff? c) How many students were there in 2007? d) How many staff members were there in 2012? [//hli//]


 * Challenge Question #8**

For the first 5 seconds, Kevin can run at a speed of 25 km/h. If his rate of speed drops continuously by 2 km/h every 5 seconds, then what's the total distance in kilometres that he ran before he came to a stop?

[kevink2435]