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katrin [286]
3 years ago
9

write an equation of a line that passes through the following tow points (4, -6) and (2, 8) show work

Mathematics
1 answer:
stiks02 [169]3 years ago
7 0

Answer:

y = -7x + 22

Step-by-step explanation:

Given

(x_1,y_1) = (4,-6)

(x_2,y_2) = (2,8)

Required

Determine the line equation

This question will be answered using linear interpolation.

This is represented as thus:

\frac{y - y_1}{x - x_1} = \frac{y_2 - y_1}{x_2 - x_1}

Substitute values for x1,x2,y1 and y2

\frac{y - (-6)}{x - 4} = \frac{8 - (-6)}{2 - 4}

\frac{y +6}{x - 4} = \frac{8 +6}{2 - 4}

\frac{y +6}{x - 4} = \frac{14}{-2}

\frac{y +6}{x - 4} =-7

Cross Multiply

y + 6 = -7(x - 4)

y + 6 = -7x + 28

Make y the subject

y = -7x + 28-6

y = -7x + 22

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Factor 15z^2+17z-18 please show work
siniylev [52]

There is no common factor between 15, 17 and 18 because 17 is prime.  

15z² +17z - 18 =  

d = 17² - 4.15.-18  

d = 289 + 1080  

d = 1369  

z = (-17 +/- \/1369) : 2 * 15  

z = (-17 + 37) : 30  

z' = 20 : 30 = 2/3  

z" = (-17 - 37) : 30  

z" = -54 : 30 = -1.8  

<><

7 0
3 years ago
What is the difference of the fractions? Use the number line and equivalent fractions to help find the answer.
ipn [44]

The difference of the fraction is \mathbf{  -\dfrac{3}{4}} by using equivalent expressions.

<h3>What is a number line?</h3>

A number line is a diagrammatic representation of real numbers on the graduated line. It ranges from negative axis to positive axis with 0 being the center position.

A sketch showing the representation of the difference in the mixed fractions can be seen in the image attached below.

Using equivalent expressions to determine the difference between the mixed fractions, we have;

\mathbf{ = -2\frac{1}{2} - (-1\dfrac{3}{4}) }

\mathbf{ = -2\frac{1}{2} +1\dfrac{3}{4} }

\mathbf{ = -\dfrac{5}{2} +\dfrac{7}{4} }

\mathbf{ = -\dfrac{3}{4}}

Learn more about number line here:

brainly.com/question/25230781

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7 0
2 years ago
Please help: Find the volume of the solid. Use 3.14 for π.
kenny6666 [7]

Answer:

3391.2

Step-by-step explanation:

The formula for the volume of a cylinder is

pi * r^2 * h

Plugging the values in we get

3.14 * 6^2 * 30

= 3.14 * 36 * 30

= 3391.2

6 0
3 years ago
I need to solve for x
aalyn [17]
6x+1 = 12x because the Z angles are the same

Solve this and you get:

1 = 12x - 6x => x = 1/6
6 0
3 years ago
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What proportion could be used to solve the question?<br> What percent of 80 is 23?
Drupady [299]
The variable X (percentage) over 100 and 23 over 80.
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3 years ago
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