A. y is tripled
B. y is doubled
11. w varies directly as the square of x and inversely as y and z. If w= 12 when x = 4, y = 2 and z= 20, find w
when x =3, y=8 and z= 5.
A. 10
B.9
C. 27/4
D. 5
12. How many man can do the same job in 6 days if 2 men can do a portion of a job in 8 days?
A. 7
B. 6
C. 5
D.4
13. If y varies inversely as x and y= 12 when x=8, find y when x = 5.
A. 4
B. 1/5
C. 4/5
D. -4/5
14. Which of the following equations describes the relation among the three variables p, q and r if p varies
directly as q and inversely as r?
A. p =qr/k
B. p=kr/g
C.1/p = kr/a
D. p=klar
15. Which of the following is the value of x when y=7 if (x + 5) varies inversely as (y-4) and x=7 when y
A. 8
B. 6
C.4
D. 3
_16. Which of the following is a radical equation in one variable?
A. Vm = 2
B. V12 = 5
C. 2x V5 +3y V3 = 10 D. V12 + V30 =
17. What is the exponential form of 2va +3VÕ?
A. 212a +3126
B. 2a 1/2 + 3b"
12
C. (2a)2+(36)12
D. (2a + 3b)2
18. Which of the following is an incorrect characteristics of radical in simplest form?
A. No fraction as radicands
C. No radical appears in the denominator of a fraction
B. No radicands with variable
D. No radicands have perfect square factors other than 1​