1. which expression has a value of 30 when x = -1 and y = 3?
a. (x - 3^2) · y - 6
b. (x - 3^2) · (y - 6)
c. x - 3^2 · (y - 6)
d. x - 3^2 · y - 6

2. which expression has a value of -18?
a. (6^2 + 2) - 8 \sqrt{81}
b. 6^2 + (2 - 8) \sqrt{81}
c. (6^2 + 2 - 8) \sqrt{81}
d. 6^2 + 2 - (8 \sqrt{81})

3. what is the value of the expression 5 + (3 · (2 - \sqrt{81}
a. -16
b. 1
c. 2
d. 7

4. which expression has a value of 26 when a = 4 and b = 5?
a. a \sqrt{16} + b - 10
b. a (\sqrt{16} + b) - 10
c. a \sqrt{16} + (b - 10)
d. (a \sqrt{16}) + b - 10

5. what is the value of the expression (c^2 + d^2) - 2(c^2 - d^2), when c = 3 and d = 2?
a. -23
b. -3
c. 3
d. 23

6. which expression has a value of 66?
a. (7^2 - 8) · 2 - 16
b. 7^2 - 8 · (2 - 16)
c. 7^2 (- 8 · 2) - 16
d. 7^2 - 8 · 2 - 16

7. what is the value of the expression y ÷ \sqrt{9} - x^3 · y, when x = 2 and y = 6?
a. -46
b. -36
c. 36
d. 46

8. what is the value of the expression 4(\sqrt{p} + q^2), when p = 49 and q = -2?
a. 12
b. 20
c. 36
d. 44

me