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tino4ka555 [31]
3 years ago
13

The sum of two numbers is 20.The difference is 4 what are the numbers?

Mathematics
1 answer:
Alex17521 [72]3 years ago
4 0
The sum of two numbers is 20 and their difference is 4. Which is the greater of the two numbers? The answer is 12.
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Toni participates in a 10-mile charity walk. For each mile she walks, a sponsor will donate $9 to the charity. The graph
TEA [102]

Answer:9 times 10 equal 90 $

Step-by-step explanation:

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2 years ago
Use matrices and elementary row to solve the following system:
LiRa [457]

I assume the first equation is supposed to be

5x-3y+2z=13

and not

5x-3x+2x=4x=13

As an augmented matrix, this system is given by

\left[\begin{array}{ccc|c}5&-3&2&13\\2&-1&-3&1\\4&-2&4&12\end{array}\right]

Multiply through row 3 by 1/2:

\left[\begin{array}{ccc|c}5&-3&2&13\\2&-1&-3&1\\2&-1&2&6\end{array}\right]

Add -1(row 2) to row 3:

\left[\begin{array}{ccc|c}5&-3&2&13\\2&-1&-3&1\\0&0&5&5\end{array}\right]

Multiply through row 3 by 1/5:

\left[\begin{array}{ccc|c}5&-3&2&13\\2&-1&-3&1\\0&0&1&1\end{array}\right]

Add -2(row 3) to row 1, and add 3(row 3) to row 2:

\left[\begin{array}{ccc|c}5&-3&0&11\\2&-1&0&4\\0&0&1&1\end{array}\right]

Add -3(row 2) to row 1:

\left[\begin{array}{ccc|c}-1&0&0&-1\\2&-1&0&4\\0&0&1&1\end{array}\right]

Multiply through row 1 by -1:

\left[\begin{array}{ccc|c}1&0&0&1\\2&-1&0&4\\0&0&1&1\end{array}\right]

Add -2(row 1) to row 2:

\left[\begin{array}{ccc|c}1&0&0&1\\0&-1&0&2\\0&0&1&1\end{array}\right]

Multipy through row 2 by -1:

\left[\begin{array}{ccc|c}1&0&0&1\\0&1&0&-2\\0&0&1&1\end{array}\right]

The solution to the system is then

\boxed{x=1,y=-2,z=1}

5 0
3 years ago
How many terms in the algebraic expression 5x4+6x3-2x+7
Tju [1.3M]

Answer:

4 Terms.

Step-by-step explanation:

5x4

6x3

-2x

7 are all of the terms in the expression.

6 0
3 years ago
Read 2 more answers
A customer went to a garden shop and bought some potting soil for $17.50 and 4 shrubs. The total bill was $53.50. Write and solv
malfutka [58]
Each shrub would cost $9.
x=(53.50-17.50)/4
Hope I help!!!
3 0
3 years ago
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Factor completely6x2+8x+2. Fill in the blanks using the correct sign: 2(3x+ )(x+ )
Alona [7]

Answer:

2(3x+1)(x+1)

Step-by-step explanation:

First, we factor out the common term, which is 2.

2(3x²+4x+1)

Then, we factor the polynomial inside the parenthesis.

2(3x+1)(x+1)

4 0
3 years ago
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