It looks like you intend
x¹⁹ -2x¹⁸ +7x¹⁷ -12x¹⁶ +6x¹⁵ = 0
x¹⁵(x -1)²(x² +6) = 0
x = 0, 1, ±(√6)i . . . . . . . selection D is appropriate
(1,2)(-2,6)
slope = (6 - 2) / (-2 - 1) = -4/3....slope is negative
Answer:
y = 28
Step-by-step explanation:
Given that y varies directly as x and inversely as z then the equation relating them is
y = ← k is the constant of variation
To find k use the condition y = 4 when x = 2 and z = 7, then
4 = ( multiply both sides by 7 )
28 = 2k ( divide both sides by 2 )
14 = k
y = ← equation of variation
When x = 6 and z = 3 , then
y = = 14 × 2 = 28
Second side = x feet
First side = x - 2 feet
Third side = x - 4 feet
Perimeter is 15 feet
15 = x + x - 2 + x - 4
Solve for x and then plug your x-value back into the three sides given above.