Answer:
It take 37.5 hours to fill the tank
Step-by-step explanation:
Given:
Time Taken to fill the tank = 15 hours
Time Taken to empty the tank = 25 hours
To Find:
Time taken to fill the tank when both the inlet and outlet is opened at the same time = ?
Solution:
Let the time to fill the tank be x
In 15 hours the tap fills the tank
Rate at which the tank is filled =
In 25 hours the tap empties the tank
Rate at which the tank is drained =
The net gain per minute on the total filling rate is
=> Rate at which the tank is filled - Rate at which the tank is drained
=>
=>
=>
=> 10x = 375
=>
=>x = 37.5
Answer: D
Step-by-step explanation: solve it by substitution
Answer:
y = 5x - 24
Step-by-step explanation:
please let me know if you want me to add an explanation :)
Answer:
- 16
Step-by-step explanation:
following the rules as set out in PEMDAS
4² - 2(3 × 5 + 1) ← evaluate exponent term
= 16 - 2(3 × 5 + 1) ← evaluate multiplication inside parenthesis
= 16 - 2(15 + 1)
= 16 - 2(16) ← perform the multiplication
= 16 - 32 ← evaluate subtraction
= - 16