Answer:The faster person will do the job in 7.53hours
Step-by-step explanation:
Let t=faster person
Let t-1= the other person
The job to be done =1
Each person will do a fraction of the job
4/t+4/t-1=1
Multiply both sides wit t(t-1)
4(t+1)+4t=t(t-1)
4t+4+4t=t^2+t
8t+4=t^2+t
0=t^2+t-8t-4
t^2-7t-4=0
Use Almighty formular to solve d quadratic equation
X=-b+- rootb^2-4ac/2a
X=t,a=1,b=-7 c=4
Substituting the values you get:
t=-7 +- root 49+16/2
t=-7 +- root 65/2
t=7 +8.06/2=15.06/2
t=7.53 hours
Answer:
2m + 10 can not be combined as they are not like terms.
However if you are looking to simplify the expression, it would be 2(m+5)
Answer:
4.11 (rounded to the hundredth place, the actual answer is 4.1(with the one repeating))
Step-by-step explanation:
To solve 37 divided by 9 you have to do long division or you can use a handheld calculator.
To solve it through long division,
9 can go into 3 zero times
9 can go into 37 four times though
9*4 is 36
So subtract 36 from 37, leaving 1.
9 can go into 1 zero times.
Add a zero behind the one and 9 can go into 10 once.
The pattern continues forever, making the answer 4.1(with the one repeating)
or 4.11 (rounded to the hundredth place)
If you need anymore clarification I can certaintly help.
Yes your answer is correct
Answer:
y=2x+4
Step-by-step explanation:
slope=2 as parallel lines have the same slope
y=2x+b , if x=2 then y=8 , so 2x2+b=8
so, b=4
Therefore the equation is y=2x+4