Answer: Interval E
Step-by-step explanation:
I took the test and it is Interval E cause the line is decreasing/going down
2x+7
2x means the same as 2 times the value of x and +7 is just increasing that by 7.
We've got the first number, so now we need the others.
There is 1 possibilty for the first digit, 10 for the middle ones, and 2 for the last one.
1*10*10*2=200
200 possible codes for this briefcase
Use distributive property: a(b - c) = ab - ac
0.2(3b - 15c) = 0.2·3b - 0.2·15c = 0.6b - 3c
