Jackie used to be on the phone times as much as her brother. Her parents threatened to take away the phone, so she cut down to of the time
she used to be on the phone. How many times as much as her brother is
Jackie now on the phone?

So there should be 6 pounds of trail mix and 44 pounds of cashews.

Step-by-step explanation:

Let x= pounds of peanuts

Let y = pounds of cashews

The two amounts have add up to 50 lbs, so that gives us the first equation:

x+y=50

Next, we know that the 50-lbs mixture needs to cost $11 per pound. We can use the per lbs info for the trail mix and cashews to make equation 2:

7x + 12y = 11*14

Now use whatever method you like to solve the equations. I will choose to use substitution method:

y = 50-x

7x + 12(50-x) = 154

7x + 600x - 15x = 154

50 = 8x

x = 6.25 or 6lbs

Use equation 1 to find y:

6+y = 50

y =  44