Step-by-step explanation:
y is directly proportional to x^2.
This means that y = kx^2, where k is a real constant.
When x = 7, y = 245:
245 = k(7)^2 = 49k. By division, k = 5.
Now we know that y = 5x^2, when x = 9, y = 5(9)^2 = 5 * 81 = 405.
Answer:
190
Step-by-step explanation:
10x5x2=100
5x3x2=30
3x10x2=60
100+30+60=190
Answer:
D because 6/30 is not the same as 2:10
I think Victoria's method is linear because the number of minutes is increased by an equal factor every month. 35+15=50+15=65+15=80
