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fomenos
3 years ago
5

Add the equations.2x-3y = -1+ 3x + 3y= 26​

Mathematics
1 answer:
hichkok12 [17]3 years ago
8 0

Answer:

The answer in the procedure

Step-by-step explanation:

we have

2x-3y=-1 ----> equation A

3x+3y=26 --> equation B

Solve the system by elimination

Adds equation A and equation B

2x-3y=-1

3x+3y=26

----------------

2x+3x=-1+26

5x=25

x=25/5

x=5

Find the value of y

substitute the value of x in equation A or equation B and solve for y

2(5)-3y=-1

10-3y=-1

3y=10+1

y=11/3

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Match each number in scientific notation with the number written in standard form and in a step by step process.
geniusboy [140]

Answer:

1) Option 3

2) Option 1

3) Option 2

Step-by-step explanation:

To find : Match each number in scientific notation with the number written in standard form and in a step by step process.

Solution :

From scientific to standard we expand the power of 10.

1) 6.82\times 10^7

Remove decimal and open the power,

6.82\times 10^7=\frac{682}{100}\times 10000000

6.82\times 10^7=68200000

Therefore, 6.82\times 10^7=68,200,000

Match with Option 3.

2) 6.82\times 10^{-6}

Remove decimal and open the power,

6.82\times 10^{-6}=\frac{682}{100}\times \frac{1}{1000000}

6.82\times 10^{-6}=\frac{682}{100000000}

Therefore, 6.82\times 10^{-6}=0.00000682

Match with Option 1.

3) 6.82\times 10^6

Remove decimal and open the power,

6.82\times 10^6=\frac{682}{100}\times 1000000

6.82\times 10^6=6820000

Therefore, 6.82\times 10^6=6,820,000

Match with Option 2.

7 0
3 years ago
a car deceased in value by 25% in the first year. purchased for $28,000, what is the car worth today.
Gwar [14]
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In this case, Principal = $28,000; interest rate = -0.25; # of years = 1

So Decrease in value = $28,000 (0.75)^1 = $21,000.
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nlexa [21]

Answer:

Step-by-step explanation:

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DedPeter [7]

Answer:

x = -3/2

x = -1/2

Step-by-step explanation:

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