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Let’s check out your problem:
Multiply.
\newline
21
2
×
31
2
=
\frac{21}{2} \times \frac{31}{2} =
2
21
×
2
31
=
_____
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Math Problems
Grade 7
Multiply and divide rational numbers
Full solution
Q.
Multiply.
\newline
21
2
×
31
2
=
\frac{21}{2} \times \frac{31}{2} =
2
21
×
2
31
=
_____
Convert to Improper Fractions:
Step
1
1
1
: Convert mixed numbers to improper
fractions
.
\newline
2
1
\frac{2}{1}
1
2
/
2
2
2
=
2
×
2
+
1
2
=
4
2
+
1
2
=
5
2
2 \times 2 + \frac{1}{2} = \frac{4}{2} + \frac{1}{2} = \frac{5}{2}
2
×
2
+
2
1
=
2
4
+
2
1
=
2
5
\newline
3
1
\frac{3}{1}
1
3
/
2
2
2
=
3
×
2
+
1
2
=
6
2
+
1
2
=
7
2
3 \times 2 + \frac{1}{2} = \frac{6}{2} + \frac{1}{2} = \frac{7}{2}
3
×
2
+
2
1
=
2
6
+
2
1
=
2
7
Multiply Improper Fractions:
Step
2
2
2
: Multiply the improper fractions.
\newline
(
5
2
)
×
(
7
2
)
=
35
4
(\frac{5}{2}) \times (\frac{7}{2}) = \frac{35}{4}
(
2
5
)
×
(
2
7
)
=
4
35
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x
x
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x
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x
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6.2
\frac{x}{x+3} = \frac{x+2}{x+6.2}
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30.4
+
(
−
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)
30.4+(-40.4)
30.4
+
(
−
40.4
)
?
\newline
30.4
−
40.4
30.4-40.4
30.4
−
40.4
\newline
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Solve for
n
n
n
and simplify your answer.
\newline
−
6
=
2
3
n
-6=\frac{2}{3} n
−
6
=
3
2
n
\newline
Answer:
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Question
3
+
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×
5
−
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×
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Question
A local package delivery service wants to improve the efficiency of its deliveries. As a first step, the management team decides to conduct a study to determine the average length of time from the arrival of a package at the company's mail center until its delivery at a home. Which of the following methods is most likely to produce valid results?
\newline
Choose
1
1
1
answer:
\newline
(A) The team selects the
1
,
000
1,000
1
,
000
heaviest packages in a one-week, non-holiday period and records how long it takes for each package to reach its destination.
\newline
(B) The team calls
1
,
000
1,000
1
,
000
residents in their delivery area and asks them whether they have received a package from their service in the past week. They will then record how long it took for those packages to reach their destination.
\newline
(C) The team selects a random sample of
1
,
000
1,000
1
,
000
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\newline
(D) None of the above
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8
+
2.7
=
8+2.7=
8
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(
1.5
−
2.9
i
)
+
(
4.3
+
1.4
i
)
(1.5-2.9 i)+(4.3+1.4 i)
(
1.5
−
2.9
i
)
+
(
4.3
+
1.4
i
)
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Question
A baker uses
3
3
3
cups
(
c
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(c)
(
c
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2
2
2
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1
1
1
pound
(
l
b
)
(lb)
(
l
b
)
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3
1
3
c
,
3\frac{1}{3} c ,
3
3
1
c
,
how many loaves of bread can the baker make with a
10
10
10
l
b
lb
l
b
- bag of flour?
\newline
(Round the answer to the nearest whole number.)
\newline
□
\square
□
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Posted 9 months ago
Question
Multiply:
\newline
−
0.1
×
−
2
5
=
-0.1 \times \frac{-2}{5}=
−
0.1
×
5
−
2
=
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