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puteri [66]
3 years ago
9

Solve the simultaneous equations 5x + 2y = -2 3x - 5y = 11.2

Mathematics
1 answer:
Annette [7]3 years ago
4 0

Answer:

X= 2/5 y=-2

Step-by-step explanation:

5x + 2y = -2

3x - 5y = 11.2

Using the elimination method

Multiply equation 1 by 3

Multiply equation 2 by 5

15x + 6y = -6

15x - 25y = 56

Subtrat  3 from 4

-31y= 62

Divide both sides by -31

y= -2

To arrive at x, substitute y= -2 in equation 1

5x + 2y = -2

5x + 2(-2)= -2

5x -4 = -2

Collect like terms

5x= -2+4

5x= 2

Divide both sides by 5

x= 2/5

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Step-by-step explanation:

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Which of the following events are dependent?
cestrela7 [59]

Answer:

A. Archie and Harris take turns picking yellow- or purple-colored chips from a dish.

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Step-by-step explanation:

Two events will be dependent if the first event influences the probability of the second event. If the first event takes something and doesn't put it back, that means the second event can't pull the same roll and the total pool of items changed.

A. Beth and Corrie take turns picking a card at random and recording each outcome. They replace the selected card at the bottom of the pile after each turn.

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3 years ago
Madame Dubois bought 20 pearl necklaces for $500. Becoming bored quickly, she sold 3/4 of them at $40 each. She sold the rest at
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4 years ago
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Step-by-step explanation:

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