Answer:
90 miles
Step-by-step explanation:
Let ori. speed = z
distance = speed × time
= z × 2
= 2z miles
distance = (z - 15) × 3
= (3z - 45)miles
2z = 3z - 45
z = 45mph
distance = 45 × 2
= 90 miles
distance = (45-15) × 3
= 90 miles
(Correct me if i am wrong)
If x = 2 + y then by substitution . . .
8 (2 + y) - 2y = 22
16 + 8y - 2y = 22
6y = 22 - 16
6y = 6
y = 1
And x = 2 + y = 2 + 1 = 3
Therefore, in (x, y) format . . . (3, 1)
Area of trapezoid =
Base 1 + base 2/2 times height
= 1.5 + 3/2 times 2
= 4.5ft squares
There is no solution since ln(0) is undefined
