There's a pair of points (3,5), (x,15) and a slope of 2 how do I find x

Mathematics

2 answers:

sergeinik [125]3 years ago

8 0

You have the slope and you have two points, so you can use the slope equation to find x.

$b=\frac{(y_2-y_1)}{(x_2-x_1)} \\2=\frac{(15-5)}{(x-3)} \\2(x-3)=(15-5)\\2x-6=10\\2x=16\\x=8$

So your answer is x = 8.

Vitek1552 [10]3 years ago

7 0

Answer:

x =7

Step-by-step explanation:

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

for points (3,5) and (x,15)

that will be m= (5-15)/(3-x)

so (5-15)/(3-x) =2

-10 / (3-x) = 2 / 1 cross multiply

-10 = 2(3-x) divide both sides by 2

-5 = 3 -x

x= 3+5 =8

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