Mario and julio are working together to detail cars. when they work together, they can wash7 cars in 2 hours. if mario works alone, her can detail 5 cars in 3 hours. if julio works alone, how long would it take him to detail 12 cars?

6.56hours.

Step-by-step explanation:

Given;

Mario and julio can wash 7 cars in 2hours

While only mario can wash 5 cars in 3hours

Let m represent the rate at which mario work

j represent the rate at which julio work

t represent the rate at which mario and jolio combined work.

t = m + j

j = t -m 1

t = 7 cars per 2hours = 7/2 = 3.5cars/hour

m = 5 cars per 3hours = 5/3 = 1.67cars/hour

From eqn 1

j = t -m = 3.5 - 1.67 = 1.83cars/hour

So, to determine the number of time it will take julio to detail 12 cars

Where = number of cars detailed

N = rate × time = j × time

time = N/j

time = 12/1.83

time = 6.56 hours

Therefore, it will take julio to detail 12 cars is 6.56 hours.

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted

abde or 1,2,4, 5 is the answer

step-by-step explanation: