Answer:
i) y∝x => y = kx and k = 2.5
ii) When x = 7, y is 17.5
Step-by-step explanation:
If y is directly proportional to x then according to the question
y∝x which means y =kx where k is any constant
From the above example
8y=20x comparing it with y = kx
y = (20/8)x
y = 2.5x
Here k = 2.5
i) y∝x => y =2.5x
ii) if x=7 then y = ?
From above
y=2.5x
Put x = 7
y = 2.5 x 7
y = 17.5
The axis of symmetry for parabola is x = 3.
Using derivative to solve for axis od symmetry is easier.
Answer:
she would charge 40$ because the travel fee is $5 and the per hour cost is 35 it would $40 including the travel fee
Step-by-step explanation:
It's true and the equation is
good luck
Answer:
10%
Step-by-step explanation:
Decrease=150- 135=15
Percentage of decrease= 15÷150×100
=10%