Try and do the Pythagorean theorem a^2 + b^2= c^2
So there are 120 minutes in 2 hours. That would mean that there are 60 minutes in 1 hour (you can divide by 2)
So since 1 hour is 60 minutes, then 15 hours would be 900 minutes (you do 60 times 15)
Does this help? :)
Answer:
9. C
10. C
11. C
Step-by-step explanation:
9.
simply, 
10.
the greatest divisor of 28 is 7, so:
28 + 7 = 35
11.
the greatest divisor of 15 is 5, so:
15 + 5 = 20
n = 20
the greatest divisor of 20 is 10, so:
20 + 10 = 30
7 is a prime number because it is only divisible by 1 and itself which is 7.
Vertex-either the highest point or lowest depending on which way the parabola is (-1,-9)
Y- int- where the graph intersects the y int- (0,-8)
X- int- where the graph intersects the x int- (-4,0) and (2,0)
axis of symmetry- where the line could be folded in half and be the same- x=-1
equation: (x-1)^2 -9=y
