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2 years ago

Given that 8x−4y=39 Find y when x=5 Give your answer as a fraction in its simplest form

Mathematics

2 answers:

elena55 [62]2 years ago

7 0

Answer:

answer is 1/4 or One divided by four

strojnjashka [21]2 years ago

7 0

Answer:

$y=\frac{1}{4}$

Step-by-step explanation:

$8x-4y=39; x=5\\\\8(5)-4y=39\\\\40-4y=39\\\\40-40-4y=39-40\\\\-4y=-1\\\\\frac{-4y=-1}{-4}\\\\\boxed{y=\frac{1}{4}}$

Hope this helps.

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kotykmax [81]

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Nex, we find the slope of the line containing M, perpendicular to WX. We know that if m and n are the slopes of 2 parallel lines, then mn=-1.

The slope of WX is $\displaystyle{ m= \frac{y_2-y_1}{x_2-x_1}= \frac{2-(-4)}{-5-5}= \frac{6}{-10}= -\frac{3}{5}$ .

Thus, the slope n of the perpendicular line is $\displaystyle{ \frac{5}{3}$ .

The equation of the line with slope $\displaystyle{ n= \frac{5}{3}$ containing the point M(0, -1) is given by:

$\displaystyle{ y-(-1)=\frac{5}{3}(x-0)$

$\displaystyle{ y+1= \frac{5}{3}x$

$\displaystyle{ 3y+3=5x$

$\displaystyle{ 5x-3y-3=0$

Answer: 5x-3y-3=0

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3 years ago

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2 years ago

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7nadin3 [17]

Answer:

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polet [3.4K]

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