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bezimeni [28]
3 years ago
10

If a is a rational number and b is a rational number, then the product ab must be

Mathematics
2 answers:
alukav5142 [94]3 years ago
8 0
The best way to answer this is to find counterarguments for each answer to eliminate them as a possibility. ab doesn't have to be an integer, 2.5*3=7.5 . That's also not an imaginary number so that's out. And that's also not an irrational number so that's out too. Only choice left is rational number.
DIA [1.3K]3 years ago
8 0

By definition, a rational number can be expressed as a fraction with integer values in the numerator and denominator (denominator not zero). So, multiplying two rationals is the same as multiplying two such fractions, which will result in another fraction of this same form since integers are closed under multiplication. Thus, multiplying two rational numbers produces another rational number. 

So in this case your answer would be A. 

Hope I helped!!!


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The area of a rectangular sheet of metal is 135 square inches. The perimeter is 48 inches. What are the dimensions of the sheet?
mezya [45]

Answer:  The length is 15 inches and breadth is 9 inches

Step-by-step explanation:

Given : Area of rectangular sheet = 135 square inches

Perimeter of rectangular sheet = 48 square inches

Now Area of rectangular sheet = Length\times Breadth =  135 square inches

perimeter of rectangular sheet = 2\times (Length+Breadth) = 48 square inches

Thus (Length+Breadth) = 24 square inches

Thus Length = 15 inches

Breadth = 9 inches

3 0
2 years ago
△​MNO​ and △​PQR​ are similar. The ratio of a side of △​PQR​ to a corresponding side of △​MNO​ is 4 : 3. If ​MN ​= 12 in., ​NO​
KonstantinChe [14]
Solve for x
4      12
--- =  ---      4x=36  36/4=9  x=9 = PQ=9in
3       x
4      18
--- =  ---       4x=54    54/4=13.5  x=13.5 QR=13.5in
3       x
4      24
--- =  ---       4x=72     72/4=18  x=18   PR=18in
3       x

18+13.5+9 = 40.5
Therefore, the perimeter of ΔPQR = 40.5inches
5 0
3 years ago
PLEASE HELP IF I DONT GET THIS IN 10 MIN ILL BE TOAST
Nikolay [14]

Answer:

your answer will be

1 -y is a variable

3- y is a term

4 -9 is a constant

6- 9 is a term

Step-by-step explanation:

if i'm wrong please correct me i hope i helped though

6 0
2 years ago
A large company claims that the average age of their employees is 32 years, with a standard deviation of four years. The average
STatiana [176]
The answer would be A
4 0
3 years ago
2. Calculate the change in temperature when it changes from 8°C to -11 °C?
Alekssandra [29.7K]

Answer:

19

Step-by-step explanation:

From 8-->0 =8

+ from 0--->-11=11

11+8

8 0
2 years ago
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