A farmer has two brands of fertilizer. Brand A contains 15% of phosphorus by weight while brand B
contains 7% of phosphorus by weight. If the farmer wants to prepare 80 kg of fertilizer containing
10% of phosphorus by weight, how much brand A fertilizer and how much brand B fertilizer should
be mixed together?

where is the graph? need more info

answer is 1

step-by-step explanation:

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x