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Margaret [11]
3 years ago
10

You go to the post office to mail 6 letters. The postage for each letter is 39¢. How much money will the post office charge you

to mail the letters?
Mathematics
2 answers:
Alborosie3 years ago
6 0
The answer is $2.34 hope this helps

Whitepunk [10]3 years ago
3 0
The answer the that would be $3.02 hope this helps!!
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A specific numeric value is often called a(n) ____.
tatyana61 [14]
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3 years ago
Use digits to write the value of the 9 in this number.<br><br> 139,648
Marysya12 [62]

Answer:

9,000

Step-by-step explanation:

the 9 is in the thousands place

( just turn every digit after it into a 0)

6 0
3 years ago
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What is the solution to the following system?
leva [86]

Answer:

(4,3,2)

Step-by-step explanation:

We can solve this via matrices, so the equations given can be written in matrix form as:

\left[\begin{array}{cccc}3&2&1&20\\1&-4&-1&-10\\2&1&2&15\end{array}\right]

Now I will shift rows to make my pivot point (top left) a 1 and so:

\left[\begin{array}{cccc}1&-4&-1&-10\\2&1&2&15\\3&2&1&20\end{array}\right]

Next I will come up with algorithms that can cancel out numbers where R1 means row 1, R2 means row 2 and R3 means row three therefore,

-2R1+R2=R2 , -3R1+R3=R3

\left[\begin{array}{cccc}1&-4&-1&-10\\0&9&4&35\\0&14&4&50\end{array}\right]

\frac{R_2}{9}=R_2


\left[\begin{array}{cccc}1&-4&-1&-10\\0&1&\frac{4}{9}&\frac{35}{9}\\0&14&4&50\end{array}\right]


4R2+R1=R1 , -14R2+R3=R3

\left[\begin{array}{cccc}1&0&\frac{7}{9}&\frac{50}{9}\\0&1&\frac{4}{9}&\frac{35}{9}\\0&0&-\frac{20}{9}&-\frac{40}{9}\end{array}\right]


-\frac{9}{20}R_3=R_3

\left[\begin{array}{cccc}1&0&\frac{7}{9}&\frac{50}{9}\\0&1&\frac{4}{9}&\frac{35}{9}\\0&0&1&2\end{array}\right]


-\frac{4}{9}R_3+R_2=R2 , -\frac{7}{9}R_3+R_1=R_1


\left[\begin{array}{cccc}1&0&0&4\\0&1&0&3\\0&0&1&2\end{array}\right]


Therefore the solution to the system of equations are (x,y,z) = (4,3,2)

Note: If answer choices are given, plug them in and see if you get what is "equal to".  Meaning plug in 4 for x, 3 for y and 2 for z in the first equation and you should get 20, second equation -10 and third 15.

7 0
3 years ago
How many thirds are in - 4 2/3
lisov135 [29]
There are 14 thirds in 4 2/3
5 0
3 years ago
What is 4 times 4 to the second power
adelina 88 [10]

Answer:

Assuming it is (4x4)^2, it is 64.

Step-by-step explanation:

The 4x4 part can basically add 1 to the exponent because you are multiplying a number by itself, and 4^3 is 64.

7 0
3 years ago
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