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agasfer [191]
3 years ago
11

Which system of linear equations has the ordered pair (-2,8) as its solution?

Mathematics
1 answer:
dexar [7]3 years ago
8 0

Answer:

y - 2x = 12 and x - 2y = -18

for \: y - 2x \\ 8 - 2( - 2) \\ 8 + 4 \\  = 12 \\ for \: x - 2y  \\  - 2 - 2(8) \\  =  - 2 - 16 \\  =  - 18

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The nut shack sells cashews for $6.00 per pound and Brazil nuts for $5.00 per pound. How much of each type should be used to mak
Kay [80]

Answer:

Number of pounds of cashews = x = 14.96 pounds

Number of pounds of Brazil nuts = y = 19.04 pounds

Step-by-step explanation:

Let us represent:

Number of pounds of cashews = x

Number of pounds of Brazil nuts = y

The nut shack sells cashews for $6.00 per pound and Brazil nuts for $5.00 per pound. How much of each type should be used to make a 34 pound mixture that sells for $5.44 per pound

Our system of equations is given as:

x + y = 34...... Equation 1

x = 34 - y

6x + 5y = 34 × 5.44

6x + 5y = 184.96.......Equation 2

Ww substitute : 34 - y for x in Equation 2

6(34 - y) + 5y = 184.96

204 - 6y + 5y = 184.96

Collect like terms

- 6y + 5y = 184.96 - 204

-y = -19.04

y = 19.04 pounds

Solving for x

x = 34 - y

x = 34 - 19.04

x = 14.96 pounds

Number of pounds of cashews = x = 14.96 pounds

Number of pounds of Brazil nuts = y = 19.04 pounds

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7^8 divide by 7y =7^6 find the value of y
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Explanation:

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