Answer:
c
Step-by-step explanation:
Answer:
The fifth number is <u>9</u>
Step-by-step explanation:
7 is the mode because it appears the most.
7 has to be the median, so the fifth number could be anything.
7 has to be the mean, so you would do:
7 x 5 = 35
35 - 7 - 7 - 7 - 5 = <u>9</u>
10 fish are still in the tank haha
True statements : 2nd one and 4th one
factored completely : 3rd one and 4th one
Let's write down what we know:
a=50+b
b=30+c
After one hour:
(a+50)*2=-70+3*(c+50)
let's eliminate the brackets:
2a+100=-70+3c+150
2a+100=+3c+80
which is:
2a=-20+3c
substituting from a=50+b:
100+2b=-20+3c
substituting from b=30+c
100+2(30+c)=-20+3c
100+60+2c=-20+3c
160+20=3c-2c
180=c.
So we know that c is equal to 40, then b will be b=30+c
b=30+180=210.
So B had 210 miles initially.