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Naily [24]
3 years ago
12

Use Guauss-jordan elimination to solve the following system of equations.

Mathematics
1 answer:
Tamiku [17]3 years ago
3 0

Answer:

(-1,2)

Step-by-step explanation:

Write out the system in a matrix

3  5     7

2(6  -1    -8 ) Multiply row two by five and add to row one.

1  0  -1 Multiply row 1 by -6 and add it to row two.

6  -1  -8

1 0 -1

0 -1 -2 Multiply bottom row by -1

1 0 -1

0 1 2

x=-1, y=2

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Find the sum of the geometric series.
sveticcg [70]

Answer:

40/3  option B

Step-by-step explanation:

20-10+5-5/2+ ...

We need to find the sum of infinite geometric series

S_n = \frac{a}{1-r}

a is the first term (20)

r is the common ratio

To find common ratio we divide second term by first term

r=\frac{-10}{20} = -\frac{1}{2}

now we plug in the values

S_n = \frac{20}{1-(-\frac{1}{2}}

S_n = \frac{20}{1+\frac{1}{2}}

S_n = \frac{20}{\frac{3}{2}}

S_n = 20 * \frac{2}{3}

sum = 40/3

7 0
4 years ago
What is the base of a parallelogram with an area of 36 square centimeters, if its height is 3 centimeters?
Semenov [28]
Area of parallelogram = base x height.
Base = area divided by height
Base = 36 divided by 3
Base = 12 cm. (not cm2 because it is not the area)
8 0
4 years ago
liz wants to buy her favorite musical group’s new cd. the cd costs $15.24, including tax. liz gives the store clerk a twenty-dol
Maslowich
20 - 15.24 = 4.76 is Liz's change
4 0
3 years ago
The regular price of a calculator is $49.95 before taxes. It goes on sale at 20% below the regular price. Before taxes are added
Kay [80]

Answer:

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Step-by-step explanation:

Since it is 20% off, we would multiply by .8, as we subtract the .2 (20%) off of the price.

$49.95 x 0.8 = $39.96

6 0
3 years ago
Use the log table to estimate the value of log10 8.65. A. .9703 B. .9037 C. .9730 D. .9370
Alex_Xolod [135]
A common logarithmic provides the following value for the log10 of 8.65:
<span><span>0.9370161
Which number is closest to this one? 
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4 0
3 years ago
Read 2 more answers
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