1.
Evaluate
a
b
+ 8 if
a
= 4 and
b
= 7
A.
55
B.
60
C.
28
D.
36
Hint
2.
In physics, the number
measures the force of gravity between two objects when
a
and
b
each stand for the mass one of the objects and
d
stands for the distance between them. Find the force of gravity when
a
= 5,
b
= 8, and
d
= 2.
A.
10
B.
20
C.
40
D.
5
Hint
3.
Evaluate
y
^{3}
if
y
= 4.
A.
43
B.
12
C.
64
D.
16
Hint
4.
Evaluate
x
^{2}
+ 2
xy
+
y
^{2}
if
= 4 and
y
= 7.
A.
86
B.
78
C.
121
D.
65
Hint
5.
Evaluate
j

k
if
j
= 10 and
k
= 2.
A.
8
B.
20
C.
12
D.
5
Hint