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2 years ago

Which of the following is an example of a proper fraction?

Mathematics

1 answer:

mafiozo [28]2 years ago

5 0

Answer:

I would appreciate if my answer is chosen as a brainliest answer

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Using Cramer's rule to solve linear systems.

Rzqust [24]

Answer: Last Option

$x=2,\ y=-5$

Step-by-step explanation:

Cramer's rule says that given a system of equations of two variables x and y then:

$x =\frac{Det(A_X)}{Det(A)}$

$y =\frac{Det(A_Y)}{Det(A)}$

For this problem we know that:

$Det(A) = |A|=\left|\begin{array}{ccc}4&-6\\8&-2\\\end{array}\right|$

Solving we have:

$|A|= 4*(-2) -(-6)*8\\\\|A|=40$

$Det(A_X) = |A_X|=\left|\begin{array}{ccc}38&-6\\26&-2\\\end{array}\right|$

Solving we have:

$|A_X|=38*(-2) - (-6)*26\\\\|A_X|=80$

$Det(A_Y) = |A_Y|=\left|\begin{array}{ccc}4&38\\8&26\\\end{array}\right|$

Solving we have:

$|A_Y|=4*(26) - (38)*8\\\\|A_Y|=-200$

Finally

$x =\frac{|A_X|}{|A|} = \frac{80}{40}\\\\x=2$

$y =\frac{|A_Y|}{|A|} = \frac{-200}{40}\\\\y=-5$

4 0

3 years ago

The longest side of an acute triangle measures 30 inches. The two remaining sides are congruent, but their length is unknown.

lakkis [162]

The smallest perimeter is 72.44 inches. The longest side of an acute triangle measures 30 inches. The two remaining sides are congruent, but their length is unknown. As much as possible, the sum of the length of the two remaining side must be greater than the other side. Given the side is 30, then the sum of the two remaining sides should be greater than 30 inches.

7 0

3 years ago

Need help with these!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Gelneren [198K]

Answer:

Step-by-step explanation:

8 0

3 years ago

A simple random sample is free from any systematic tendency to differ from the population from which it was drawn.

Ket [755]

Answer:

Pretty sure that it is False

Step-by-step explanation:

Sampling variation, random samples dont really reflect the population from where i is drawn, but it is close.

4 0

3 years ago

H<br> nlaced inside a cylinder as shown. The radius of the cone is half the radius of the cylinder.

Sophie [7]

Answer:

umm what or we doing?

Step-by-step explanation:

5 0

3 years ago