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algol [13]
2 years ago
15

How to multiply 21 x 25 in oldschool way

Mathematics
1 answer:
VladimirAG [237]2 years ago
8 0
Use a calculator i don't know
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How do you solve this ?
saveliy_v [14]

When given a value of the variable, we replace each instance of the variable in the problem with that number. In this case, the expression becomes:


\frac{3^2 + 3}{3 - 1}


After this, we merely need to simplify the answer.


\frac{9 + 3}{3 - 1}


\frac{12}{2}


Simplifying 12/2 gives us the answer 6.

5 0
2 years ago
Given the graph below, which of the following statements is true?<br>​
miss Akunina [59]

Since there is nothing attached for me to help you I looked for a website that can find the answer with an explanation. It is called quickmath it’s like a math calculator . Hopefully that helps you .

8 0
3 years ago
Read 2 more answers
Car X weighs 136 pounds more than car Z. Car Y weighs 117 pounds more than car Z. The total weight of all three cars is 9439 pou
Aleksandr [31]

Let x, y and z denote the weighs of car X, car Y and car Z, respectively.

We know that car X weighs 136 more than car Z, this can be express by the equation:

x=z+136

We also know that Y weighs 117 pounds more than car Z, this can be express as:

y=z+117

Finally, we know that the total weight of all the cars is 9439, then we have:

x+y+z=9439

Hence, we have the system of the equations:

\begin{gathered} x=z+136 \\ y=z+117 \\ z+y+z=9439 \end{gathered}

To solve the system we can plug the values of x and y, given in the first two equations, in the last equation; then we have:

\begin{gathered} z+136+z+117+z=9439 \\ 3z=9439-136-117 \\ 3z=9186 \\ z=\frac{9186}{3} \\ z=3062 \end{gathered}

Now that we have the value of z we plug it in the first two equations to find x and y:

\begin{gathered} x=3062+136=3198 \\ y=3062+117=3179 \end{gathered}

Therefore, car X weighs 3198 pound, car Y weighs 3179 pounds and car Z weighs 3062 pounds.

4 0
1 year ago
The first and fourth terms of a proportion are called the means.
expeople1 [14]

Answer:

Never is the correct answer.

Step-by-step explanation:

The 1st and 4th terms are the extremes, the 2nd and 3rd terms are the means.

6 0
1 year ago
Find the range of the data. <br><br> 98, 21, 52, 39, 45 76
Alenkinab [10]

Answer:

77

Step-by-step explanation:

The range of the data is largest number minus smallest number.

98-21

77

8 0
3 years ago
Read 2 more answers
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