85.What is the value of the expression bx+ zy
when b= –5,x=6,y= ^12 and z= –8?
a. 46
b.–46
c.–76
d. 76
86.What is the value of the expression m 3
2
– 4m+
10 when m= 6?
a.–12
b.–2
c. 6
d. 12
e. 22
87.What is the value of the expression
4(x–y)(2xy)(3yx) whenx= 2 and y= –2?
a. 6
b. 8
c. 12
d. 24
e. 384
88.What is the value of the expression 7x+ ^1 x^2 – z
when x= 6 and z = –8?
a. 52
b. 36
c. 58
d. 46
89.What is the value of the expression (3xy + x)
x
ywhen x= 2 and y= 5?
a. 16
b.12.8
c.32.4
d. 80
90.What is the value of the expression 57 a 2 + 130 a
a
whena= –2?
a.– 110
b.– 225
c.–^25
d. 25
91.What is the value of the expression ^62 xy 2
2
+ ^43 xy
when x= 2 and y=3?
a.^49
b.^43
c.^290
d.^291
e.^133
92.What is the value of the expression
ab + ab+ a^2 – b^2 when a= 1 and b= –1?
a.–4
b.–3
c.–2
d.–1
e. 0
93.What is the value of the expression (xy)y
x
ifx= 2 and y= –x?
a.–4
b. 2156
c. 116
d. 4
e. 16
- PRE-ALGEBRA FUNDAMENTALS–