Find the x value so that the line through the points (x,-9) and (0,1) has a slope of -4

1 answer:

4 0

Find x in equation.
M = -4
$y = m(x) + b \\ 1 = 0 + b \\ b = 1$
$y = m(x) + b \\ - 9 = ( - 4)(x) + 1 \\ - 10 = - 4x \\ x = \frac{5}{2}$

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BlackZzzverrR [31]

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$y = 8 \: \: \: x = - 10$

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$4( - 6x - 9y = - 12) \\ 3(8x + 9y = - 8) \\ \: \: \: \: \: \: \\ - 24x - 36y = - 48 \\ 24x + 27y = - 24 \\ \\ - 9y = - 72 \\ y = 8 \\ \\ \\ \\ \\ - 6x - 9y= - 12 \\ - 6x - 72 = - 12 \\ - 6x = - 12 + 72 \\ - 6x = 60 \\ x = - 10$

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Serhud [2]

8) x represents the number of pounds of peanuts, and y represents the number of pounds of raisins

9)
Solve:
x+2y=9
-2y -2y
x=9-2y

2(9-2y) + 3y=14
18-4y+3y=14
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-y=-4
y=4

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Mike took a taxi from his home to the airport. The taxi driver charged an initial fee of $6 plus $3 per mile. The total fare was

prohojiy [21]

3m+6=24

3m=18

m=6

So mike traveled 6 miles by taxi.

We know that the taxi driver chargers $3 per mile, so we say M is the mile variable, and for every M there is $3. So 3m+6 (initial fee) is the first part of the formula.

We set 3m+6=24 (24 being the total amount the taxi driver is charging)

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