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jonny [76]
2 years ago
12

riddle me this I'm thinking of a number it is odd is between 1 and 100 is higher than 20 it is smaller than the answer to 6 time

s 6 it is a multiple of 5 the sum of its digits is 7
Mathematics
2 answers:
Bogdan [553]2 years ago
6 0
I think it might be 27
Snezhnost [94]2 years ago
6 0
- odd number between 20 and 36
36 - 20 = 16 / 2 = 8 possible numbers
21, 23, 25, 27, 29, 31, 33, 35

- multiple of 5
leaves only two of the above possibilities
25 or 35

- sum of digits = 7
2 + 5 = 7

The number must be 25
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1000

Step-by-step explanation:

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Two submersibles, one red and one blue, started rising toward the surface at the same time. They each rose at a constant speed.
Mrrafil [7]

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Step-by-step explanation:

4 0
1 year ago
Jackie ordered a set of wood and metal clothes pins. Of the 276 pins, 172 were wood. What percentage of the clothes pins were me
timurjin [86]

We know that 172 of them were wood, so the rest are metal. To find that number we do:

276 - 172 = 104 metal pins.

To find the percentage that they were metal, take the number of metal pins and divide by the total number of pins:

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Multiply this by 100:

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8 0
2 years ago
Let T W Rn ! Rm be a linear transformation. Show that if T maps two linearly independent vectors onto a linearly dependent set,
Mandarinka [93]

Answer:

The solution proves that the equation has a non-trivial solution.  

Step-by-step explanation:

We want to show that the equation has nontrivial solutions for which c_{1} T(v_{1} ) + c_{2} T(v_{2} ) + c_{3} T(v_{3}) = 0

Let c_{i} be a set of non-zero numbers such that that c_{1} v_{1}  + c_{2} v_{2} + c_{3} v_{3}  = 0

Because T is a linear solution:

c_{1}T(v_{1} ) + c_{2} T (v_{2} ) + c_{3} T (v_{3} ) = T (c_{1} v_{1} ) + T(c_{2}v_{2} ) + T(c_{3} v_{3} )

                                            = T(c_{1}v_{1}  + c_{2} v_{2}  + c_{3} v_{3} )

                                            = T(0)

                                            = T (00)

                                            = 0T(0)

                                            = 0

This shows that T( v_{1} ) are linearly independent with the mapping resulting in a non-trivial solution.

6 0
1 year ago
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anzhelika [568]

Answer:

A(t)=6\cdot2^{-\frac{t}{5730 }

Step-by-step explanation:

The general formula for exponential decay given a half-life t_\frac{1}{2} is

N(t)=N_{0}\cdot2^{\frac{-t}{t_{1/2} }      

where N(t) is the amount at time t, N_0 is the initial amount (at time t=0), and t_\frac{1}{2} is the half life of the substance.

The half life of carbon-14, is approximately 5,730 years.

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Therefore:

Amount of carbon-14 remaining in the bone fragment after t years is:

A(t)=6\cdot2^{-\frac{t}{5730 }

6 0
2 years ago
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