Quiz 2

8 problems, 1 point each

Show steps of solutions. Just right answers without explanation will not be graded with full credit. You can type solutions in MS Word file and submit it in docx format or you can write solutions on a paper and submit it as a scan file of your handwriting. Before you send your file, open it on your computer and make sure all details of submission are visible (not blurry or too small to read).

1. Solve an equation: + 2 =

2. Solve for A: B = + C

3. A salesman is paid a base salary of $3,000 a month plus 15% commission of all sales over $6,000 during the month. How much must this employee sell in one month to receive monthly salary of $3,600? (Assign x, make an equation and solve for x).

4. Find the slope for the given equation of line: 2x + 5y = 10

5. What is the equation of the line on the graph? (find x- and y-intercepts for each equation below and compare them with the graph).

a) x - y = 6 b) 6x + y = 6 c) 3x - 2y = 6 d) 2x + 3y = 6

6. Solve system of equations using substitution technique:

4x + y = 17 x – 2y = - 7

7. Solve system of equations using elimination by addition technique:

3x + 2y = 7 5x – 2y = 1

8. Simple calculator costs $5 and scientific calculator costs $15. The store sold 12 calculators for total amount of $100. How many of each calculator was sold? (Assign x and y, create system of two equations and solve the problem).