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Devin is a landscaper who needs to prepare different types of grass seed for his customers' yards. Bluegrass seed costs \$2.00$2.00dollar sign, 2, point, 00 per pound while drought-resistant seed costs \$3.00$3.00dollar sign, 3, point, 00 per pound. If for a particular day the two types of grass seed totaled \$68.00$68.00dollar sign, 68, point, 00 and together weighed 252525 pounds, how many pounds of bluegrass seed did Devin prepare

Respuesta :

Answer:

7 pounds

Explanation:

Let us assume the x for the 1 pound of bluegrass seed  and y for the pound of drought resistant seed

Now the first equation would be

x + y = 25    ............................ (i)

we can write

y = 25 - x

Now the second equation would be

2x + 3y = 68  .............................. (ii)

Now put  y value in the equation 2

So

2x + 3(25 - x) = 68

2x + 75 - 3x = 68

x= 7

Therefore the bluegrass seed is 7

Now for drought-resistant it would be

7 + y = 25

y = 18

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