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mylen [45]
2 years ago
14

Is (2,-2) a solution to the following system of equations?

Mathematics
2 answers:
SCORPION-xisa [38]2 years ago
8 0

Answer:

yes?

Step-by-step explanation:

is this a true or false question

(its true)

Nana76 [90]2 years ago
8 0

Answer:

No

Step-by-step explanation:

Remark

No

If it was, the value for x should give you the same y in both cases. Try it out.

<u>First Equation</u>

y = -2x + 2

x = 2

y = -2*2 + 2 = -4 + 2 = - 2

<u>Second equation</u>

x = 2

y = 7*2 + 11

y = 14 + 11

y = 25

Conclusion

They are no where near being the same

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The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.3 days and a standard de
inna [77]

Answer:

<em>The probability of spending between 4 and 7 days in recovery</em>

<em>P(4≤x≤7) = 0.5445</em>

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given mean of the Population μ = 5.3 days

Given standard deviation of the population 'σ' = 2 days

Let 'X' be the random variable in normal distribution

Let    x₁ = 4

Z_{1} = \frac{x_{1}-mean }{S.D} = \frac{4-5.3}{2} = -0.65

Let    x₂ = 7

Z_{2} = \frac{x_{2}-mean }{S.D} = \frac{7-5.3}{2} = 0.85

<u><em>Step(ii):-</em></u>

<u><em>The probability of spending between 4 and 7 days in recovery</em></u>

<em>P(4≤x≤7) = P(-0.65≤Z≤0.85)</em>

<em>              =  P(Z≤0.85) - P(Z≤-0.65)</em>

<em>             = 0.5 + A( 0.85) - ( 0.5 - A(-0.65) </em>

<em>             = 0.5 + A( 0.85) -  0.5 +A(0.65)   ( ∵A(-0.65) = A(0.65)</em>

<em>            =   A(0.85) + A(0.65)</em>

<em>           = 0.3023 + 0.2422</em>

<em>          = 0.5445</em>

<u><em>Final answer:</em></u><em>-</em>

<em>The probability of spending between 4 and 7 days in recovery</em>

<em>P(4≤x≤7) = 0.5445</em>

<em>            </em>

6 0
3 years ago
I need to use the method of elimination for this math problem.
Mumz [18]

Answer:

Step-by-step explanation:

____________

Good evening ,

_________________

Look at the photo below for the answer.

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:)

3 0
3 years ago
A pizza restaurant gave a 20% discount on the supreme pizza which cost $16. what was the sale price?
Inga [223]

Answer:

you saved $3.20

Step-by-step explanation:

16 x 20/100

16 x 0.2

= 3.20

so 16-3.20= 12.80

final price is 12.80

6 0
2 years ago
Give an example of an equation that is true.
bonufazy [111]

Answer:

5 + 4 = 9

Step-by-step explanation:

7 0
3 years ago
I just want to see if my answer is correct, I haven't done volume in a long time!
motikmotik
You did it right because 12 x 2 = 24 x 8 = 192
7 0
3 years ago
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