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3 years ago

X + y = 5 ; x - y =3 solve using linear combination

Mathematics

1 answer:

Bas_tet [7]3 years ago

7 0

Answer:

x = 4

y = 1

Step-by-step explanation:

use one equation to solve for one variable.

y = 5 - x

Now plug the value of y in the other equation

x - (5-x) = 3

x+x= 3+5

2x=8

x=4

Now use the value of x to find the value of y on the first equation

y = 5 - x

y = 5 - 4

y = 1

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Answer:

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Step-by-step explanation:

If you round $246 to 240, then divide it by 3, you should get $80. The cost per pair should be around $80 each

For the exact answer you take the amount spent (246) and divide it by the amount of jeans she bought (3).

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2 years ago

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2 years ago

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Answer:

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Step-by-step explanation:

Given that :

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From the z tables;

P(X> 1560) = 1 - 0.6915

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The standard deviation = $\sqrt {52 \times 0.3085 (1-0.3085)}$

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Then;

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Answer:

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Step-by-step explanation:

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