Answer:
Options A and D are correct.
Step-by-step explanation:
The cost y (in dollars) for x ounces of peanuts is represented by the equation
.... (1)
It means the cost of each ounce of peanuts is $0.23.
The cost y (in dollars) for x ounces of pecans is represented by the equation
.... (2)
It means the cost of each ounce of pecans is $0.45.
$0.45 > $0.23
It means the cost for pecans is greater than the cost of peanuts. Option B is incorrect.
The cost for peanuts is $0.22 per ounce less than the cost for pecans. Option A is correct.
Substitute x=8 in equation (1).
The cost for 8 ounces of peanuts is $1.84. Option C is incorrect.
Substitute x=8 in equation (2).
he cost for 8 ounces of pecans is $3.60.. Option D is correct.
Answer:
Auxiliary pump should be started at 6:36 PM
Step-by-step explanation:
Let the volume of oil tanker be V.
An oil tanker can be emptied by the main pump in 5 hours,
An auxiliary pump can empty the tanker in 12 hours,
We need to find when should the auxiliary pump be started so that the tanker is emptied by 9 PM if the main pump is started at 5 PM.
Difference in times = 4 hours
That is main pump works for 4 hours and let auxiliary pump works for t hours.
We have
So auxiliary pump works for 2.4 hours,
It should be started at 9 - 2.4 = 6.6 PM = 6:36 PM
Auxiliary pump should be started at 6:36 PM
I don’t know what that says
Answer:
Mary-15
Joan-9
Step-by-step explanation:
1) create an equation with the information given:
x•(x+6)=135
2) using this create a quadratic equation by distributing and getting all the terms to one side:
y=x²+6x-135
3) finally use the quadratic formula, ((-b)±√(b²-(4•a•c)))/(2•a)
4) using this you will find the value for Joan's age. Add six to Joan's age to find Mary's
5) You can check your answer by multiplying them to see if they equal 135.