Answer:
4.24 hours
Step-by-step explanation:
Irina can paint 1/9 of a room in 1 hour since she can paint a room in 9 hours. 1/9x, where x is the number of hours she works and 1/9 of a room per hour is her speed, would be her part of the calculation.
Paulo can paint 1/8 of a room in 1 hour since he can paint an entire room in 8 hours. 1/8x, where x is the number of hours he works and 1/8 of a room per hour is his speed, would be his part of the equation.
1/9x + 1/8x = 1 (Irina's portion of the room plus Paulo's portion of the room equals one complete room) would be the equation.
Look for a denominator that has the same value as the numerator. Both 9 and 8 split evenly into 72 as the initial number. We multiply the top of 1/9 by 8 to convert the fraction and get 8/72x because 9*8 = 72. We multiply the top of 1/8 by 9 to convert the fraction and get 9/72x because 8*9 = 72. We have 8/72x+9/72x=1 currently.
17/72x=1
÷ both sides by 17/72:
17/72x ÷ 17/72 = 1÷17/72
∴ x=1/1 * 72/17
∴ x=72/17= 4.24
The set is not closed
Example:
-4 * -3 = 12 this is not a negative integer
What class is for ? If you tell me I could take out my notes
Answer:
Candidate receives 2250 votes
Step-by-step explanation:
Ratio of votes A : B = 75 : 25 = 3 : 1
3 : 1 = x : 750
Product of means = Product of extremes
1 *x = 3*750
x = 3 *750
= 2250
Answer:
250
Step-by-step explanation:
Line it up least to greatest
187,199,211,250,298,347,362
Cut each one off at each ends until middle
250
