Brackets in equations

12 questions

1. Turning the expression 5(y-2) into 5y-10 is known as ___ the brackets.
2. 2(x+4) and 2x+4 are the equivalent expressions. True or false?
3. Which of these are expressions for the perimeter of this square?
4. What equation does this bar model represent?
5. Expand 7(y+8).
6. Expand -7(y+8).
7. If you multiply both sides of an equation by 2, you will maintain ___.
8. True or false? Multiplying by 5 and then adding 10 is the same as adding 10 then multiplying by 5.
9. What equation does this bar model represent?
10. What does this bar model represent?
11. Multiply both sides of this equation {1\over3}x-5 = 2x+7 by 3.
12. Which of the below is the most efficient first step to solve the equation {3\over{x}}= 10 ?

License: OGL