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Byju's Answer
Standard XII
Mathematics
Types of Linear Programing Problems
Given interch...
Question
Given interchanges: Signs:
×
a
n
d
+
and numbers 2 and 8
A
8
×
2
+
9
=
19
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B
2
×
8
+
10
=
13
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C
2
+
8
×
6
=
22
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D
8
×
2
+
6
=
19
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Solution
The correct option is
C
2
+
8
×
6
=
22
On interchanging
×
a
n
d
+
and 2 and 8 in (c), we get an equation
8
×
2
+
6
=
22
o
r
16
+
6
=
22
which is true.
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Similar questions
Q.
Given interchanges: Signs:
×
and + and numbers 2 and 8 ______________.
Q.
State which is greater:
(i) (8 + 9) × 10 and 8 + 9 × 10
(ii) (8 − 9) × 10 and 8 − 9 × 10
(iii) {(−2) − 5} × (−6) and (−2) −5 × (−6)
Q.
Simplify:
(1) (−8) + (−3)
(2) 13 − 15
(3) 6 − (−19)
(4) 10 + (−7)
Q.
Are the following expressions polynomials?
(1) 21 − 8a + a
2
(2) n
3
− 6n
2
+ 13
(3)
8
x
2
-
x
7
2
(4)
-
13
9
(5)
n
-
1
n
(6)
2
5
a
3
-
7
a
+
19
(7) 51
(8) 9 − 5b
2
+ b
4
(9)
12
+
10
p
-
2
Q.
In the given series
5
,
6
,
8
,
2
,
5
,
5
,
2
,
5
,
4
,
2
,
8
,
5
,
3
,
5
,
2
,
8
,
6
,
8
,
2
,
5
,
2
,
8
,
6
,
2
,
8
,
5
,
7
,
2
,
8
how many times the number
′
2
′
has come before
8
and
5
has not come after
8
?
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