Answer: 39$
Step-by-step explanation: 4 hrs and 30 mins and you make 27$
You gotta make the hrs into minutes. So you can find the rate. 4 hrs is 240 minutes. With the 30 minutes its a total of 270 minutes. You're earning 1 dollar every 10 minutes. So i think if i did the math right 390 minutes is 6 hrs and 30 mins. And so she has earned 39$.
Answer:
Let's call the length of the field "l", and the width of the field "w".
If the area of the field is 72 square meters, then we have:
l x w = 72
And if the length is 6 meters longer than the width, we have:
l = w+6
So looking at the first equation (l x w = 72), we can substitute the l for a w+6.
And we obtain:
(w+6) x (w) = 72
Which simplifies to w^2 + 6w = 72.
This quadratic equation is pretty easy to solve, you just need to factor it.
w^2 + 6w - 72 = 0
(w-6)(w+12)
This leaves the roots of the quadratic equation to be 6 and -12, but in this case, a width of -12 wouldn't make sense.
So, the width of the rectangular field is 6, and the length of the field is 12.
Let me know if this helps!
Answer:
The answer is "(27,3]"
Step-by-step explanation:
Please find the complete question in the attached file.
![\to f(-5) = (-5)^2 + 2 = 25 +2 =27\\\\\to f(7)= 7-4 = 3\\\\answer \ is = ( 27, 3]\](https://tex.z-dn.net/?f=%5Cto%20f%28-5%29%20%3D%20%28-5%29%5E2%20%2B%202%20%3D%2025%20%2B2%20%3D27%5C%5C%5C%5C%5Cto%20f%287%29%3D%207-4%20%3D%203%5C%5C%5C%5Canswer%20%5C%20is%20%3D%20%28%2027%2C%203%5D%5C)
A negative number * another negative number gives a positive value
A positive number * another positive number also gives a positive value
The solutions are -4, 4
Hope this helps :)
Answer:
A lot
Step-by-step explanation:
So basically you learn a lot
