Answer:
Approximately 3.1 hours.
Step-by-step explanation:
We have been given that Amy counted 60 numbers per minute and continued to count nonstop until she reached 11,000.
First of all, we will divide total numbers by number counted per minute to find minutes taken by Amy to count total numbers.
![\text{Minutes taken by Amy to count total numbers}=\frac{11,000}{60}](https://tex.z-dn.net/?f=%5Ctext%7BMinutes%20taken%20by%20Amy%20to%20count%20total%20numbers%7D%3D%5Cfrac%7B11%2C000%7D%7B60%7D)
![\text{Minutes taken by Amy to count total numbers}=\frac{550}{3}](https://tex.z-dn.net/?f=%5Ctext%7BMinutes%20taken%20by%20Amy%20to%20count%20total%20numbers%7D%3D%5Cfrac%7B550%7D%7B3%7D)
![\text{Minutes taken by Amy to count total numbers}=183.33333](https://tex.z-dn.net/?f=%5Ctext%7BMinutes%20taken%20by%20Amy%20to%20count%20total%20numbers%7D%3D183.33333)
We know that 1 hour equals 60 minutes, so we will divide 183.33333 by 60 to convert time in hours as:
![\text{Hours taken by Amy to count total numbers}=\frac{183.33333}{60}](https://tex.z-dn.net/?f=%5Ctext%7BHours%20taken%20by%20Amy%20to%20count%20total%20numbers%7D%3D%5Cfrac%7B183.33333%7D%7B60%7D)
![\text{Hours taken by Amy to count total numbers}=3.055555](https://tex.z-dn.net/?f=%5Ctext%7BHours%20taken%20by%20Amy%20to%20count%20total%20numbers%7D%3D3.055555)
![\text{Hours taken by Amy to count total numbers}\approx 3.1](https://tex.z-dn.net/?f=%5Ctext%7BHours%20taken%20by%20Amy%20to%20count%20total%20numbers%7D%5Capprox%203.1)
Therefore, it will take Amy approximately 3.1 hours to complete the counting.
Answer:
1. 6+(-3)
2. 6+3
3. -6+(-3)
4. -6+3
pa brainliest thankk youu!!
Answer:
Option E
Step-by-step explanation:
Putting x = 3
2³ • 3⁴ - 6 ÷ 2
8 • 81 - 3
648 - 3
645
Therefore
Option E is correct
Answer:
4 boys, 3 girls
Step-by-step explanation:
brothers of John ⇒ x
sisters of John ⇒ y
John has as many brothers as sisters:
- x = y
brothers of Emily ⇒ x + 1 (Emily have the same amount of brother as John, plus one (John))
sisters of Emily ⇒ y -1 (Emily have the same amount of sister as John, minus one (herself))
Emily has twice as many brothers as sisters:
- 2 (y-1) = x+ 1
Now we have a system of 2 equations and 2 variables
x=y (I)
2y - 2 = x + 1 (II)
____________
Replace x in equation II
2y - 2 = y + 1
2y - y = 2 + 1
y = 3
____________
Replace y in equation I
x = y = 3
That mean that John have 3 brothers plus himself, there is 4 boys in the family and John have 3 sister, so there is 3 girls in the family