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kirza4 [7]
3 years ago
15

Solve for x 3(x+2)+4(x-5)=10

Mathematics
1 answer:
Natasha_Volkova [10]3 years ago
8 0

Answer:

x=24/7

Step-by-step explanation:

3(x+2)+4(x-5)=10

3x+6+4(x-5)=10

3x+6+4x-20=10

7x+6-20=10

7x-14=20

7x=24

x=24/7

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Solve this system of equations: 3x-2y=2 5x-5y=10
Maurinko [17]

Answer:

(- 2, - 4 )

Step-by-step explanation:

Given the 2 equations

3x - 2y = 2 → (1)

5x - 5y = 10 → (2)

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3 years ago
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Using Multiple regression, the relationship of Y to four other variables was established as: Y = 12 + 3X₁ – 5X₂ + 7X₃ + 2X₄ When
alexdok [17]

Answer:

The estimate of Y changes by -2 or decreases by 2.

Step-by-step explanation:

We are given the following information:

Using Multiple regression, the relationship of Y to four other variables was established as:

Y = 12 + 3X_1- 5X_2 + 7X_3 + 2X_4

X_1 increases 2 units and X_2 increases 1 unit, while X_3 and X_4 remain unchanged.

Predicted Y =

Y_p = 12 + 3(X_1+2) - 5(X_2+1) + 7X_3 + 2X_4

Change in Y =

Y_p - Y \\= 12 + 3(X_1+2) - 5(X_2+1) + 7X_3 + 2X_4-(12 + 3X_1 - 5X_2 + 7X_3 + 2X_4)\\= 12-12+3(X_2+1-X_2)-5(X_2+1-X_2) + 7X_3 - 7X_3 + 2X_4 - 2X_4\\=3 - 5\\= -2

The estimate of Y changes by -2 or decreases by 2.

3 0
3 years ago
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