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Substituting and evaluating algebraic expressions questions and answers
What is the value of the expression
p
2
(
n
-
r
2
)
n
r
given that p=4, n=6,r=2?
A.
2
2
3
B.
21
1
3
C.
32
D.
1
1
3
(2m 19s)
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1.
What is the value of
a
(
b
c
-
d
2
)
a
2
+
b
2
if a=2, b=4,c=8 and d=5? A.
7
18
B.
7
10
C.
3
2
3
D.
1
19
20
2.
what is the value of:
2
d
(
a
2
-
c
b
2
)
4
d
+
3
a
if a=5, b=3, c=1 and d=
1
4
? A.
1
8
B.
1
2
C.
7
32
D.
16
17
3.
What is the value of
2
z
2
-
2
(
x
-
y
)
x
-
y
if x=4, y=2 and z=3? A. 3 B. 4 C. 7 D. 16
4.
What is the value of:
18
a
+
6
b
2
c
(
b
+
8
)
if a=5, b=7 and c=2 A. 12.8 B. 5.8 C. 16.5 D. 61.8
5.
What is the value of
a
2
(
2
b
-
c
)
if a=4, b=3 and c=2? A. 16 B. 32 C. 94 D. 64
6.
What is the value of
8
a
(
4
b
2
-
c
2
)
2
a
c
+
a
b
c
if a=
1
2
, b=3,c=4? A.8 B.
6
2
5
C.
12
4
15
D.5
7.
if m=5, p=m+3 and r=
1
2
p
+
2
, what is the value of
4
r
-
(
p
-
m
)
p
+
r
A.
1
1
2
B.
11
14
C.
1
9
D.
1
4
13
8.
What is the value of:
2
a
+
b
-
c
a
+
c
when a=4, b=c+2 and c=a-1? A.
1
1
7
B.
1
3
7
C.
1
1
3
D.
1
1
9
9.
What is the value of ab+
1
2
b
2
c
if a=2, b=5 and c=10? A. 35 B. 60 C. 135 D. 260
10.
What is the value of
3
(
p
-
q
)
+
r
2
p
-
q
given that p=6, q=r-4 and r=p+2? A.
1
3
4
B.
2
3
4
C.
3
1
2
D.
5
1
2
11.
What is the value of:
4
x
2
-
√
y
2
2
x
if x=4 and y=6? A.
7
1
4
B.5 C.
3
1
2
D.2
12.
What is the value of
x
2
(
2
y
-
z
)
when x=y+1, y=3 and z=y-1? A. 16 B. 32 C. 64 D. 94
13.
What is the value of:
m
+
r
2
p
+
r
given m=2p, p=n+5, n=3r and r=5? A.
2
1
5
B.
2
3
5
C.
3
1
4
D. 2
14.
What is the value of:
2
s
+
r
q
if q=4, r=2q+1 and s=r+2? A.
5
B.
6
3
4
C.7 D.
7
3
4
15.
What is the value of the expression
p
2
(
n
-
r
2
)
n
r
given that p=4, n=6,r=2? A.
2
2
3
B.
21
1
3
C.
32
D.
1
1
3
16.
what is the value of
1
3
(
2
x
+
4
y
2
)
+
5
p
-
8
when p=6, x=2p and y=
1
2
x
-
1
A. 130 B.
63
1
3
C.
43
1
3
D.
36
2
3
17.
What is the value of
r
(
p
2
+
q
p
)
r
+
q
given r=6, p=r+2 and q=p-3? A.
56
8
11
B.
38
6
11
C.
30
6
11
D.
20
4
5
18.
What is the value of:
2
q
-
r
y
+
n
where n=5,y=2n,q=n+9 and r=q-6? A. 7 B.
2
1
2
C.
6
1
5
D.
11
19.
What is the value of
2
w
(
x
-
2
)
2
y
+
1
when x=5, y=x+3 and w=2x+y? A. 12 B. 24 C. 36 D. 144
20.
what is the value of
p
(
2
r
+
q
)
q
- r, where p=3,q-p=4 and r=
p
+
q
2
A.
8
5
7
B.
6
4
7
C.
2
2
7
D.
2
7
21.
What is the value of 2b (a+c)+ac when a=b=3 and c=2? A. 66 B. 36 C. 30 D. 21
22.
What is the value of
2
a
+
b
c
where c=4, b=2c+1 and a=b+2? A. 3 B.
4
3
4
C.7 D.
7
3
4
23.
What is the value of
2
x
+
3
y
+
4
z
(
y
z
)
2
. If x=2, y=
x
2
and z=3y? A.9 B.
6
1
3
C.
3
1
6
D.
2
1
9
24.
What is the value of:
s
(
T
-
R
)
2
T
+
R
2
if S=3, R=4, T=9? A.
1
2
13
B.
1
13
17
C. 3 D. 9
25.
What is the value of:
2
r
2
-
t
+
s
s
-
t
when r=4, s=t+2 and t=r-l? A. 37 B. 17 C. 12 D. 9
26.
what is the value of
Z
(
x
2
4
+
y
)
-
1
2
where x=3, y=x-2 and z=
1
2
A.
1
1
8
B.
7
8
C.
3
4
D.
3
8
27.
What is the value of
x
+
2
n
-
r
y
where x=5, y=2x, n=x+9 and r=n+6? A.
2
1
2
B.
2
C.
6
1
5
D.
5
4
5
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