Hey there, Lunablum!
These questions were already answered on your previous post. But to summarize the answers are
f(x) = x
-5
0
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Answer:
55 miles
Step-by-step explanation:
11 miles = 45 min
speed = distance/time
speed = 11/45
speed = 0.2444 miles/min
for 225 min, speed is same
distance = speed * time
= 11/45 * 225
=55 miles
I think so:
Your working out is probably just the same as my working out!
Answer:
44/60
Step-by-step explanation:
Answer:
There's no direct variation
Step-by-step explanation:
Required
Determine if there's a direct variation between the number and its position
I'll start by giving an illustration of how the triangle is represented using stars (*)
*
**
***
****
*****
Represent the line number with y and it's position with x
On line 1:
y = 1, x = 1
On line 2:
y = 2, x = 3
On line 3:
y = 3, x = 6
On line 4:
y = 4, x = 10
On line 5:
y = 5, x = 15
Note that, x is gotten by calculating the accumulated number of stars while y is the line number.
Direct variation is represented by
y = kx
Or
kx = y
Where k is the constant of variation
For line 1:
Substitute 1 for y and 1 for x
k * 1 = 1
k = 1
For line 2:
Substitute 2 for y and 3 for x
k * 3 = 2
Divide through by 3
k = ⅔
Note that the values of k in both computations differ.
This implies that there's no direct variation and there's no need to check further.
