Business, 10.03.2020 09:07 FailingstudentXD

Birdseed costs $0.690.69 a pound and sunflower seeds cost $0.990.99 a pound. Angela Leinenbachs' pet store wishes to make a 5050 pound mixture of birdseed and sunflower seeds that sells for $0.810.81 per pound. How many pounds of each type of seed should she use?

Answers: 1

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Answers

30 pounds of Birdseed seed should be used and 20 pounds of Sunflower seeds should be used to make a 50 pound mixture that costs $0.81081 per pound.

Explanation:

50 pound mixture

(0.69069)(50-x) + (0.99099)x = 0.810.81 *50

34.5345 -0.69069x + 0.99099x = 40.54

0.300x = 40.54 - 34.534

x = 6.004 / 0.300

x = 20

50 - x = 30

Answer from: justintintran

30 pounds of bird seeds and 20 pounds of sunflower seeds is needed for the 50 pound mixture

Explanation:

Let us use "a" to represent the amount of bird seeds (in pounds) that will be needed for the mixture and "b" to represent the amount of sunflower seeds (in pounds) that Will also be required for the mixture.

Since bird seeds cost $0.69 per pound, sunflower seeds cost $0.99 per pound and the 50 pound mixture will be sold for $0.81 per pound (meaning that the 50 pound mixture will cost: 0.81 × 50 = $40.5).

Then : (0.69×a)+(0.99×b)= 0.81×50

0.69a+0.99b =40.5 ---this is equation 1

Since a combination of some quantities of bird seeds (in pounds) and sunflower seeds (in pounds) will be required to produce the 50 pound mixture, then:

a + b = 50 this is equation 2

From the equation above, making "b" the subject of the formula, we have:

b = 50 - a

Substitute "b" for "50 - a" in equation 1:

0.69a + [0.99×(50-a)] = 40.5

0.69a + (49.5 - 0.99a) = 40.5

0.69a + 49.5 - 0.99a = 40.5

49.5 - 0.3a = 40.5

0.3a = 49.5 - 40.5

0.3a = 9

a = 9/0.3

a = 30 pounds

Then substitute "a" for 30 in eqn 2

Substitute "a" for 30 in equation 2

30 + b = 50

b = 50 - 30

b = 20 pounds

Therefore 30 pounds of bird seeds and 20 pounds of sunflower seeds will be required to produce the 50 pound mixture that will be sold for $0.81 per pound.

Answer from: Quest

To be honest, here's what i think. i think the answer is (and i'm not exactly sure), that it is, both personal and household income.

Answer from: Quest

you have to put the parentheses like this:

$(85-4) \div 9 \times 10$

in fact, you have to perform the operation inside parentheses first, and then proceed in order:

$81 \div 9 \times 10 = 9 \times 10 = 90$

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Birdseed costs $0.690.69 a pound and sunflower seeds cost $0.990.99 a pound. Angela Leinenbachs' pet...

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