11. CHALLENGE PROBLEM Ricardo Price wants to purchase laundry detergent. Double-strength detergent costs $7.11 for a 50-ounce box that will wash
26 loads, $9.99 for a 100-ounce box that will wash 64 loads, and $20.29
for a 150-ounce box that will wash 96 loads. Regular-strength detergent
costs $9.99 for a 200-ounce box that will wash 64 loads. Calculate the
price (a) per ounce and (b) per load, and then (c) determine the best buy.

there is nothing below so i cannot

step-by-step explanation:

delaney would like to make a 5lb nut mixture that is 60% peanuts and 40% almonds.

she has several pounds of peanuts and several pounds of a mixture that is 20% peanuts and 80% almonds.

let 'p' represent the number of pounds of peanuts needed to make the new mixture, and  

let 'm' represent the number of pounds of the 80% almond-20% peanut mixture.

:

p + m = 5

therefore

m = (5-p)

write an equation based on the percent of peanuts

1p + .2m = .6(5)

replace m with (5-p)

p + .2(5-p) = .6(5)

p + 1 - .2p = 3

p - .2p = 3 - 1

.8p = 2

p = 2/.8

p = 2.5 lbs of peanuts required

then

5 - 2.5 = 2.5 lbs of the peanut/almond mixture required

:

a) what is the system that models this situation?

p + m = 5

1p + .2m = .6(5)