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2 years ago

2x + y = 3

Mathematics

1 answer:

kaheart [24]2 years ago

5 0

9514 1404 393

Answer:

5y = 5

Step-by-step explanation:

-2(x -2y) +(2x +y) = -2(-1) +(3) . . . . -2 times [eq2] + [eq1]

-2x +4y +2x +y = 2 +3 . . . . eliminate parentheses

5y = 5 . . . . . . . . collect terms

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Add and simplify 9/16 plus 1/2 equals to

dexar [7]

I'm pretty sure the answer is 1 1/16

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3 years ago

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Evaluate:<br><br> 16 - 12 + 13.5 - - 14

Oxana [17]

Answer:

31.5

Step-by-step explanation:

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2 years ago

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If records indicate that 15 houses out of 1000 are expected to be damaged by fire in any year, what is the probability that a wo

nordsb [41]

Answer: 0.01708

Step-by-step explanation:

Given : If records indicate that 15 houses out of 1000 are expected to be damaged by fire in any year.

i.e. the probability that house damaged buy fire in a year : $p=\dfrac{15}{1000}=0.015$

The formula for binomial distribution is given by :-

$^{n}C_xp^x(1-p)^{n-x}$

Now, the probability that a woman who owns 14 houses will have fire damage in 2 of them in a year (put n=14 and x=2), we get

$^{14}C_2(0.015)^2(1-0.015)^{14-2}\\\\=\dfrac{14!}{2!(14-2)!}(0.015)^2(0.985)^{12}\\\\=0.0170788520518\approx0.01708$

Hence, the required probability = 0.01708

4 0

2 years ago

Please help me , i have no idea what the answer is

liraira [26]

So,

We see in Statement 3 that WY = WY. This seems obvious, but it ensures that quantities don't change their values. We call this property of something being equal to itself, the "reflexive property."

The correct answer is the third option.

4 0

3 years ago

Sam bought 3 pens for $0.49

Zigmanuir [339]

Answer:

The answer should be 3.15

Step-by-step explanation:

Multiply $0.49 by 3 and you get $1.47.

Add $1.59 and $1.47 and you get $2.97

Add $2.97 plus 6% and you get 3.1482

$3.15.

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2 years ago