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2 years ago

8. y 5 х -5 Ut --5 slope = Please help me

Mathematics

1 answer:

Burka [1]2 years ago

4 0

Go choose the one you think

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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

Is 210879 divisible by 3

Setler79 [48]

Answer:

Yes

Step-by-step explanation:

210879 divided by 3 equals 70293.

7 0

3 years ago

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At a summer camp, 5 out of 12 campers are signed up for horseback riding. If there are 432 campers at the camp, how many are sig

beks73 [17]

Answer:

The answer is 180.

Step-by-step explanation:

(5/12) x 432 = 180

4 0

2 years ago

write the equation of a line that is parallel to y = - 3/2 x -1 and that passes through the point (4,6)

maria [59]

Answer:

Step-by-step explanation:Given Equation of line has slope m=-3/2

So the line passing through (4,6) has the same slope because both are parallel

From slope intercept form we have

y-y1=m(x-x1)

y-6=-3/2(x-4)

y-6=-3/2x +3/2(4)

y=-3/2x+12

2y=-3x+24

3 0

3 years ago

Evaluate the expression solve for s = -1

Stels [109]

Answer:

16.7

Step-by-step explanation:

48(-1) + 32.7 - 32(-1)

-48+32.7+32

5 0

3 years ago

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