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gabby and sydney bought some pens and pencils. gabby bought 4 pens and 5 pencils for $6.71. sydney bought 5 pens and 3 pencils for $7.12. find the cost of each item.

this question has me stumped! it is solving systems word problems. the steps say "define variables , set up equations and solve, identify the answer" im stumped and could really use an explanation on how to solve this, because when i tried to, i got (0.39, 26269/32000) ! you!

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

the first option i believe

step-by-step explanation:

step-by-step explanation:

where is the question is there is a formula or is there not one