1.
Evaluate 3
x
+ 2
y
if
x
= 3 and
y
= 7.
A.
5
B.
105
C.
23
D.
27
Hint
2.
Evaluate
if
a
= 9,
b
= 6 and
c
= 3.
A.
11
B.
9
C.
5
D.
15
Hint
3.
The equation
where
d
represents the distance in miles
and
t
is the number of seconds between seeing lightening and
hearing thunder, tells how far away a thunderstorm is.
How far is it to a thunderstorm if you count 15 seconds between
seeing the lightening and hearing the thunder?
A.
10 miles
B.
3 miles
C.
1 mile
D.
15 miles
Hint
4.
Evaluate 7 × (
a
- 4) if
a
= 9.
A.
28
B.
35
C.
59
D.
63
Hint
5.
Evaluate
a
b
+ 8 if
a
= 4 and
b
= 7
A.
28
B.
55
C.
36
D.
60
Hint