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solong [7]
2 years ago
12

For which of the following compound inequalities is there no solution?

Mathematics
1 answer:
tamaranim1 [39]2 years ago
3 0

Answer:

I THINK A

Step-by-step explanation:

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A researcher plans to identify each participant in a certain medical experiment with a code consisting of either a single letter
Digiron [165]

Answer:

at least 5

Step-by-step explanation:

<u><em>If the question was similar to the one given below </em></u>

A researcher plans to identify each participant in a certain medical experiment with a code consisting of either a single letter or a pair of distinct letters written in alphabetical order. What is the least number of letters that can be used if there are 12 participants, and each participant is to receive a different code?

<em><u>The answer would be as follows</u></em>

If we use 3 letters or any distinct letter as a comma such that 2 are in alphabetical order then we would get

4C2= 6 ways to use these letters and the comma

If we use 4 letters or any distinct letter as a comma such that 2 are in alphabetical order then we would get

5C2= 10 ways to use these letters and the comma

If we use 5 letters or any distinct letter as a comma such that 2 are in alphabetical order then we would get

6C2= 15 ways to use these letters and the comma

We need the least number of the alphabets to assign codes to 12 participants.

So the least number of alphabets is 5 because it can give codes to at least to  12 people .

Pair of alphabets + distinct letter ≥ 12

5 + 1  ≥ 12

6c2  ≥ 12

15  ≥ 12

3 0
2 years ago
Kendra and her horse completed the barrel racing course in 15.839 seconds. what is the number rounded to the nearest tenths? exp
Illusion [34]
Please answer please please thank you thank
3 0
3 years ago
A system of linear equations is given as x + 3y = 36 and 4x + 5y = 9. Which of the following is a possible first step when solvi
Nikitich [7]

Answer:

Rewrite the first equation as x = 36 – 3y.

Step-by-step explanation:

x + 3y = 36 (1)

4x + 5y = 9 (2)

Using substitution method

From (1)

x = 36 - 3y

Substitute x = 36 - 3y into (2)

4x + 5y = 9

4(36 - 3y) + 5y = 9

144 - 12y + 5y = 9

- 12y + 5y = 9 - 144

-7y = -135

y = -135 / -7

y = 19.3

There is an error with the second equation, 4x + 5y can not be equal to 9

Nevertheless, the first step when solving by substitution is:

Rewrite the first equation as

x = 36 – 3y.

4 0
3 years ago
Find the point, M, that divides segment AB into a ratio of 3.1 if A is at (-4,-2) and B is at (4. -10).
Natasha_Volkova [10]

Answer:

The coordinates of M are (2,-8)

Step-by-step explanation:

The coordinates of the point that divides the line segment joining

A(x_1,y_1) to B(x_2,y_2) in the ratio m:n is given by:

(\frac{mx_2+nx_1}{m+n},\frac{my_2+ny_1}{m+n})

If A is at (-4,-2) and B is at (4. -10) and the ratio is 3:1.

Then

(\frac{3(4)+1(-4)}{3+1},\frac{3(-10)+1(-2)}{3+1})

(\frac{8}{4},\frac{-32}{4})

The coordinates of M are (2,-8)

7 0
3 years ago
A real estate agent earns 2.4% on the sale of a house priced at $89,950.
juin [17]

Answer:

$2158.8

Step-by-step explanation:

x/89,950= 2.4/100

89,950(2.4)= 215880

215880/100 gets you 2158.8. hope this helped

8 0
3 years ago
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