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just olya [345]
3 years ago
14

Plzzz tell me the answer and working out

Mathematics
1 answer:
postnew [5]3 years ago
3 0
1. we know she needs 3 packs of biscuits
2. Shop A you only need to pay for 2 packs
3. Shop B you only need to pay for 2 packs
4. Shop C you need to pay for all three
5. so we know C is out of the option.
1.90 \times 2
so shop A and B will cost the least
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An internet site asks its membersmembers to call in their opinion regarding their web searching habits. Which type of sampling i
SOVA2 [1]

Answer: E. Convenience

Step-by-step explanation:

  • A convenience sampling is a method of sampling whose structure is based on accessibility to the researcher .

Given : An internet site asks its members to call in their opinion regarding their web searching habits.

Here the internet site is working according to its accessibility .

Hence, this is a type of convenience sampling .

8 0
3 years ago
Matrix multiplication was used to encode a message using the given encoding matrix: [i 47 A=1 |-1 -3] The original message was c
nadya68 [22]

Answer:

A^{-1}=\left[\begin{array}{cc}-3&-4\\1&1\end{array}\right] message SHOW_ME_THE_MONEY_  

Step-by-step explanation:

The matrix

A=\left[\begin{array}{cc}1&4\\-1&-3\end{array}\right]\rightarrow |A|=(1 \times -3)-(-1\times 4)=1\\\rightarrow A^{-1}=\left[\begin{array}{cc}-3&-4\\1&1\end{array}\right] \\

We can check that in fact A*A^⁻1=I_2 the identity matrix of size 2 x 2.

Now the message was divided in 1 x 2 matrices, then we have that the sequence given is the result of multiplying m by A, so to get m again we multiply now by A^⁻1. and we get the next table

Encoded message    Decoded message    message in letters by association

11 52        19 8    S H

-8 -9         15 23  O W

-13 -39        0 13   _ M

5 20         5 0   E _

12 56        20 8    T H

5 20         5 0    E _

-2 7           13 15  M O

9 41         14 5   N E

25 100       25 0    Y _

Then the message decoded is SHOW_ME_THE_MONEY_                                

3 0
3 years ago
PLZ ANSWER QUICK HURRY PLZZZ WILL MARK BRANIEST
yuradex [85]

Answer:

1=z-9

2=9+z

3=9/z

4=9z

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
75% of 48 explain the process too!
weqwewe [10]
Let us consider 48 as 100%
so,
48------------->100
x -------------->75
therefore,
100*x=48*75
x=(48*75)/100
x=36
4 0
3 years ago
A number N is greater than 3. Which of the following best represents the location of 3N
Nesterboy [21]

Answer:

The second number line represent the location of 3N values.

Step-by-step explanation:

The first number line represent the inequality <em>N</em> > 3.

Now, the new number is 3<em>N</em>.

Consider the second number line values:

3N = {12, 15, 18, 21, ....}

The second number line represent the location of 3N values.

5 0
3 years ago
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