1.
Evaluate 3
x
+ 2
y
if
x
= 3 and
y
= 7.
A.
23
B.
105
C.
27
D.
5
Hint
2.
Evaluate
b
3
+ 6 if
b
= 2.
A.
15
B.
512
C.
14
D.
12
Hint
3.
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.
40
C.
5
D.
20
Hint
4.
Evaluate
y
3
if
y
= 4.
A.
16
B.
64
C.
43
D.
12
Hint
5.
Evaluate
x
2
+ 2
xy
+
y
2
if
= 4 and
y
= 7.
A.
86
B.
78
C.
121
D.
65
Hint
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.