Page 98 - Algebra

Exercise
4
1. If 20a = 81, find the value of 20𝑎+2 = 81
a) 3
c) 0800
e) Cannot be determined
b) 400 d) 1200
2. If 4x = 64 and 9(x+y) = 6561, what is the value of x – y.
a) 2 b) 3 c) 4 d) 5 e) 0
3. What is the value of the equation if a = 1 (√𝑥 + 𝑎 ) = 2(x – 2).
a) {– 3, 5} 44
b) {3, 5} c) {3, – 5} d) {2, 5}
44
e) {–2, 5} 4
4. If 3y + 3y + 3y = 9x, find the value of y.
a) y = 2x + 1
c) y = 2x – 1
e) None of these
b) y = x + 1 d) y = x – 1
3
5. If f(x) = √2b2√𝑏(1 + 𝑥) and f(4) = 20, find the value of b.
a) b = 10 b) b = 15 c) b = 20 d) b = 25 e) b = 30
Page 97 of 177
Algebra I & II