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2 years ago

Sam missed a question on his Algebra Test. He wrote his work down. Where is his error in solving 3x + 2 = 14?

Mathematics

2 answers:

slavikrds [6]2 years ago

4 0

Answer: x = 4

Explanation:

3x + 2 = 14
3x = 12
x = 4

I’m not sure what the mistakes is but that’s how you solve it.

Snowcat [4.5K]2 years ago

3 0

Answer:

10/3

Step-by-step explanation:

Step 1: Subtract 4 from both sides.

−

Step 2: Divide both sides by 3.

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George has $49 which he decides to spend on x and y. commodity x costs $5 per unit and commodity y costs $11 per unit. he has th

FromTheMoon [43]

We are given the equations:

5 x + 11 y = 49 --> eqtn 1

u = 3 x^2 + 6 y^2 --> eqtn 2

Rewrite eqtn 1 explicit to y:

11 y = 49 – 5 x

y = (49 – 5x) / 11 --> eqtn 3

Substitute eqtn 3 to eqtn 2:

u = 3 x^2 + 6 [(49 – 5x) / 11]^2

u = 3 x^2 + 6 [(2401 – 490 x + 25 x^2) / 121]

u = 3 x^2 + 14406/121 – 2940x/121 + 150x^2/121

u = 4.24 x^2 – 24.3 x + 119.06

Derive then set du/dx = 0 to get the maxima:

du/dx = 8.48 x – 24.3 = 0

solving for x:

8.48 x = 24.3

x = 2.87

so y is:

y = (49 – 5x) / 11 = (49 – 5*2.87) / 11

y = 3.15

Answer:

George will choose some of each commodity but more y than x.

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2 years ago

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castortr0y [4]

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3 years ago

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Alborosie

Answer:

Step-by-step explanation:

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2 years ago

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Kaylis [27]

Step-by-step explanation: