In rectangle lmnp ln=7x-8 and mp=4x+1 find the length of ln

LN = 13 units.

Step-by-step explanation:

If LMNP is a rectangle, then LN and MP are the two diagonals of the rectangle and they are equal.

Now, given that LN = 7x - 8 and MP = 4x + 1

So, 7x - 8 = 4x + 1

⇒ 3x = 9

⇒ x = 3

Therefore, LN = 7x - 8 = 7(3) - 8 = 13 units. (Answer)

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x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18