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3 years ago

I need help, I am not familiar with this.

Mathematics

1 answer:

tekilochka [14]3 years ago

8 0

Answer:

the first did it correct

Step-by-step explanation:

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Write a fraction that is equivalent to 3/5<br> that has a denominator of 20.

jek_recluse [69]

Answer:

12/20

Step-by-step explanation:

6 0

3 years ago

Please help

Lerok [7]

Answer:

The sine function ranges between -1 and 1, so the minimum is -1 and the maximum is 1.

8 0

2 years ago

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

Find the surface area of a cube is 150 cm2. What is the length an edge of

Alex Ar [27]

Answer:

Step-by-step explanation:

The formula is 6x^2

If you set it equal to 150

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3 years ago

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A person climbs many evenly-spaced steps to reach the top of

matrenka [14]

Answer:

6.8 percent or 6.8%

Step-by-step explanation:

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3 years ago