A+ Answers

1. Solve the system of equations, 
3x+7y= 17 and 3x+ 11y= 9.

2. Seventeen percent of a number is 51.7. What is the number?

3. Write the equations of the line using the given information. Write the equations in slope-intercept form, given the points (3,9) and (1,8).

4. The number of people afflicted with the common cold in the winter months steadily decreased by 7851 each year from 2009 until 2013. In 2013, 73,333 people were inflicted.
• Find the linear function that models the number of people inflicted with the common cold Cas a function of the year, t?

• When will the output reach 0?

5. A statistician is collecting data to help her estimate the number of fast food restaurants in a certain city. She needs 57 pieces of data and is 71 percent done. How many pieces of data has she collected?

6. write the augmented matrix for the linear system.
2x + 3y = 12 4x + y = 14