Let the number be x.
7x-x=42
6x=42
x=7
the number is 7
Answer:
C. 20 seconds
Step-by-step explanation:
We want to know when y=0
The first y is when it started and the second y=0 is when it stops
Looking at the graph y=0 at x=0 and y=0 at x=20
The fan started at time 0 and stopped at 20 seconds
To solve this, add 17 to both sides:
x = -25 + 17
x = -8
First you add like terms in which this case is -.46x and .16x which equals -.3x then divide 6.6 into -.3 which is -22. x = -22
The answer for this problem is a,c, and d
