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2 years ago

Answer numbers 16-18

Mathematics

1 answer:

lana66690 [7]2 years ago

4 0

Number 16- 216
number 17- 180
number 18- 252

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What are the intercepts of the line?

Karo-lina-s [1.5K]

<h3>x intercept is -3 and y intercept is 9</h3>

Solution:

Given equation of line is:

y = 3x + 9

Find the x intercept:

Substitute y = 0 in given

0 = 3x + 9

3x = -9

Divide both sides by 3

x = -3

Thus x intercept is -3

Find the y intercept:

Substitute x = 0 in given

y = 3(0) + 9

y = 0 + 9

y = 9

Thus the y intercept is 9

7 0

2 years ago

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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

2 years ago

Mr.Scott weekly salary is $37 less than Mr. Khanna's. If Scott weekly salary is $584, what is Khanna's weekly salary?

ycow [4]

Answer:

Khannas salary is $547

Step-by-step explanation

Literally all you have to do is subtract 584 by 37.

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2 years ago

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Please help me out here! I’ll give you brainliest if you give me the correct answer :)

antoniya [11.8K]

Answer:

Step-by-step explanation:

5 minutes, 8 minutes, 6 minutes

3 0

2 years ago

Whats the answer???

Nookie1986 [14]

Answer:

35 I think

Step-by-step explanation:

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2 years ago

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