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garri49 [273]
3 years ago
7

4y = 9x - 21 y = x-4

Mathematics
2 answers:
Anastaziya [24]3 years ago
5 0

Answer:

x = 1

y = -3

Step-by-step explanation:

if y = x - 4

then reorganise the first equation

4 (x - 4) = 9x -21

4x - 16 = 9x - 21

5 = 5x

x = 1

jasenka [17]3 years ago
3 0

Answer:

Point form:

(1,-3)

Equation form:

x = 1 ,y = -3

Please let me know if this is incorrect.

Hope I helped though.

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Someone please help me thank you
alexandr1967 [171]
<h3>Answer: Slope = -3/4</h3>

slope = rise/run

rise = -3 ... move down 3 units

run = 4 .... move to the right 4 units

============================================

Work Shown:

m = slope

m = rise/run

m = (change in y)/(change in x)

m = (y2-y1)/(x2-x1)

m = (-17-(-2))/(24-4)

m = (-17+2)/(24-4)

m = -15/20

m = -3/4 is the slope

----------------

It basically means "move down 3 units, and move to the right 4 units"

So, slope = rise/run = -3/4

rise = -3 = move down 3 units

run = 4 = move to the right 4

You could express the slope as a decimal, and that would be -3/4 = -0.75, but you lose the rise and run values. So I recommend you keep the fraction.

Another problem with decimals is that sometimes we could have approximations that aren't exact. For example, if the slope was 2/3, then that approximates to 0.667 which may cause rounding errors down the line. Though I should point out that decimals do have their advantages in some cases.

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3 years ago
What is a1 of the arithmetic sequence for which a3=126 and a64=3,725
Evgesh-ka [11]
D=an-am/n-m
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Answer:

Step-by-step explanation:

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Proud of you!! <3 :)

Step-by-step explanation:

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