Answer:
32.7 min
Step-by-step explanation:
60 x 300 = 18000 / 550 = 32.7
Answer:
Step-by-step explanation:
Answer:
option B is correct
Step-by-step explanation:
since here we want to see if there is a relationship between two variables (taking different drug and headache levels_)
option B is correct
B. test of independence
Answer:
Step-by-step explanation:
3x+8y=-5
-2x+2y=18
Ok, so you want to get either x or y to cancel out so lets multiply the first equation by 2 and the second equation by 3.
6x+16y=-10
-6x+6y=54
Now x can cancel out. The new equation is:
22y=44
y=2
Now you input 2 into one of the original problems.
-2x+2(2)=18
-2x+4=18
Now subtract 4 from both sides.
-2x=14
Divide
x=-7
Now check your answer.
-2(-7)+2(2)=18
14+4=18