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eduard
1 year ago
13

Solve the system by finding the determinants and using Cramer's Rule:2x - y = 43x + y = 1D= 10, Dx = 10, Dy=-20Answer: (1, -2)D

= 5, Dx = 5, Dy = -10Answer: (1, -2)D= -2, Dx = -2, Dy = 4Answer: (1, -2)D = 14, Dx = 28, Dy = 0Answer: (2,0)

Mathematics
1 answer:
Nonamiya [84]1 year ago
7 0

Find out the determinant

we have

2x-y=4

3x+y=1

so

D=(2)(1)-(-1)(3)

D=2+3

D=5

therefore

<h2>the answer is the second option</h2><h2>Verify</h2>

solution (1,-2)

equation 1 -------> 2(1)-(-2)=4 -------> 4=4 is true -----> is ok

equation 2 ------> 3(1)-2=1 -----> 1=1 ----> is true -----> is ok

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Simplifying an Expression with the Numerator and the Denominator Raised to a Power
slamgirl [31]

Answer:

The answer to your question is    the second option     \frac{1}{x^{48}y^{36}z^{6}}

Step-by-step explanation:

Expression

                       [\frac{(x^{2}y^{3})^{-2}}{(x^{6}y^{3}z)^{2}}]^{3}

Process

1.- Divide the fraction in numerator and denominator

a) Numerator  

 [(x²y³)⁻²]³ = (x⁻⁴y⁻⁶)³ = x⁻¹²y⁻¹⁸

b) Denominator

 [(x⁶y³z)²]²= (x¹²y⁶z²)³ = x³⁶y¹⁸z⁶

2.- Simplify like terms

a) x⁻¹²x⁻³⁶ = x⁻⁴⁸

b) y⁻¹⁸y⁻¹⁸= y⁻³⁶

c) z⁻⁶

3.- Write the fraction

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6 0
3 years ago
Which of these systems of linear equations has no solution?
Alika [10]

Answer:

A is correct

Step-by-step explanation:

A has no solution because since the slopes are the same, setting both equations equal to each other will cancel out the slopes and result in 8=16, meaning no solution will make both sides equal to each other.

B does have a solution because of different slopes

C does have a solution because of different slopes

D does have a solution because of different slopes

7 0
3 years ago
A house has increased in value by 28% since it was purchase. if the current value is $416,000, what was the value when it what w
EleoNora [17]

Answer: 300,000

Step-by-step explanation:

6 0
2 years ago
An Native American tepee is a conical tent. Find the number of cubic feet of air in a teepee 10 ft. in diameter and 12 ft. high.
marta [7]
For this case what you should know is that by definition the volume of the cone is given by:
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