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lianna [129]
1 year ago
5

Real number root for V-49

Mathematics
1 answer:
Sauron [17]1 year ago
5 0

Step-by-step explanation:

there is no real number solution for the square root of a negative number.

a sqare root multiplied by itself had to deliver exactly the number inside the square root.

so for sqrt(-49), what can be the answer ?

which number multiplied by itself gives -49 ?

it any negative number at that.

because

a × a = a²

and

-a × -a = a² but definitely not -a².

we get a negative number only, when we multiply a positive number with a negative number or vice versa.

the only solution is complex or imaginary (based on the imaginary number i):

i² = -1

i = sqrt(-1)

so, sqrt(-49) = sqrt(49 × -1) = 7×sqrt(-1) = 7i

but again, no real solution.

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Two containers, A and B begin with equal volumes of liquid.
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Answer:

volume left in A is 80ml

Step-by-step explanation:

let original volume in both be x ml

after pouring from A to B

vol in A = x - 120

vol in B = x + 120

now it is given that

vol in B = 4 times vol in A

implies

x + 120 = 4 \times (x - 120) \\ x + 120 = 4x - 480 \\ 3x = 600 \\ x = 200

hence original volume in A is 200ml. after pouring in B it is 200-120 = 80 ml

8 0
2 years ago
Multiply a number by 3 subtract 6 add 2 result is 20 what is the number
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8 is the correct answer 
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Which probability distribution table corresponds with this frequency distribution table
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Answer:

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Step-by-step explanation:

First find the sum

\sum f=4+6+1+4+5=20.

Now, find the probabilities:

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Hence, the frequency distribution table is

\begin{array}{cccccc}x&1&2&3&4&5\\f&0.2&0.3&0.05&0.2&0.25\end{array}

4 0
3 years ago
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Answer:

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Thus, 2nd consecutive odd integers  = 2n + 1 + 2 = 2n + 3

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Thus, 4 consecutive odd integers are

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thus expression is 8(n+2)

7 0
3 years ago
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