wpostServer: http://css.washingtonpost.com/wpost

Could you pass a tenth grade math test?

Question 1 of 7

Tonja and Edward are participating in a jog-a-thon to raise money for charity. Tonja will raise $20, plus $2 for each lap she jogs. Edward will raise $30, plus $1.50 for each lap he jogs. The total amount of money each will raise can be calculated using the following expressions where n represents the number of laps run:

Tonja: 20 + 2n

Edward: 30 + 1.50n

After how many laps will Tonja and Edward have raised the same amount of money?

Stan weighs 150 pounds (lbs) and would like to gain between 0.5 and 1.0 pound (lb) per week over the next 10 weeks. He plans to record his progress on the graph below. On the graph, the dotted line represents a weight-gain rate of exactly 0.5 pound per week, and the solid line represents a weight-gain rate of exactly 1.0 pound per week.

If Stan gains between 0.5 and 1.0 pound per week, which region on the graph will contain all possible points that could represent Stan’s weight-gain progress?

Tom used the Pythagorean theorem to calculate the direct distance from his house to the park. He found the distance to be the square root of 50 miles.

Which of the following is equivalent to square root of 50?

Highlands Park is located between two parallel streets: Walker Street and James Avenue. The park faces Walker Street and is bordered by two brick walls that intersect James Avenue at point C, as shown below.

What is the measure of ∠ACB, the angle formed by the park’s two brick walls?

In 1790, the United States had a population of approximately 4,000,000 people, as shown on the graph below.

According to the graph, in what year had the population grown to approximately twice that number?

An environmental group needed to determine the number of palmetto palms in a nature preserve. The group used a map of the preserve and counted the number of palmetto palms within a square section.

Assuming that the number of palmetto palms within the square section is representative of the entire nature preserve, which is closest to the number of palmetto palms within the entire nature preserve?

In music a certain “A note” has a frequency of 440 hertz (vibrations per second). This is called the first harmonic. The second harmonic of that “A note” is 880 hertz, and the third harmonic is 1,320 hertz. According to this pattern, what is the frequency of the fifth harmonic?

Submit
Next
Review your answers and share

 
Read what others are saying

    Most Read

    The Post MostMost-viewed stories, videos, and galleries in the past two hours