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irinina [24]
3 years ago
10

A television newscaster from a 24-hour news station wants to estimate the number of hours per day its

Mathematics
1 answer:
svlad2 [7]3 years ago
3 0

Answer:

B, using a sample of size 200

Step-by-step explanation:

just got it right

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Solve by factorising<br><br><img src="https://tex.z-dn.net/?f=x%5E%7B2%7D" id="TexFormula1" title="x^{2}" alt="x^{2}" align="abs
Paladinen [302]

Step-by-step explanation:

\underline{ \underline{ \text{Solving \: a \: quadratic \: equation \: by \: factorisation \: method}}} :

In this method , the second order of polynomial ax² + bx + c is factorised and expressed as the product of two linear factors. Then each linear factor is separately solved to get the required solutions of the equation by applying zero factor property. In zero factor property , if p•q = 0 , then either p = 0 or q = 0 . In other words , if the product of two numbers is 0 , then one or both of the numbers must be 0.

\underline{ \underline{ \text{Let's \: solve}}} :

\tt{ {x}^{2}  + 16x +  55 = 0}

Here , we have to find the two numbers that multiplies to 55 and adds to 16.

⤑ \tt{ {x}^{2}  + (11 + 5)x + 55 = 0}

⤑ \tt{ {x}^{2}  + 11x + 5x +  55 = 0}

⤑ \tt{x(x + 11) + 5(x + 11) = 0}

⤑ \tt{(x + 5)(x + 11) = 0}

Either :

\tt{x + 5 = 0 \: \:  \:  \:  \: \:  \:  \:  \:  \:  \:  \:  \: Or :  \:  \:  x + 11 = 0}

\sf{⟶ x  = 0 - 5} \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:    \:⟶  x =  0 - 11

\tt{⟶x =  - 5 } \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:     \:  \:⟶   x =  - 11

\red{ \boxed{ \boxed{ { \tt{Our \: final \: answer :  \boxed{ \underline{  \bold{ \tt{x  =  - 5 \: , - 11}}}}}}}}}

Hope I helped ! ♡

Have a wonderful day / night ! ツ

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6 0
3 years ago
52% of what number of 109
nikitadnepr [17]

Answer:

209.615384

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Which equations are related equations to x+14=12x+14=12?
Nataly_w [17]
X + 14 = 12
x + 14 - 14 = 12 - 14
x = 12 - 14

Options B and C are related to the given equation.
4 0
3 years ago
What's 52 times 86? Please Help!!!!
ivann1987 [24]
Fifty two times eighty six = 4472
7 0
3 years ago
Read 2 more answers
The answer choices are
pogonyaev
The answer is b the median decreased and the median increased
4 0
3 years ago
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