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masya89 [10]
3 years ago
15

12a-3b2, when a=9,b=4

Mathematics
2 answers:
Archy [21]3 years ago
4 0

Answer:

12a - 3 {b}^{2}  = 12(9) - 3 {(4)}^{2} \\   = 108 - 48 \\  = 60

yarga [219]3 years ago
4 0

Answer:

60

Step-by-step explanation:

Just substitute the value

12\cdot (9) - 3 \cdot(4)^2 = \\108 - 48 =60

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Subract the childs age in years from 30 then divide the result by 2
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Step-by-step explanation:

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3 years ago
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Find the explicit formula for the geometric sequence cn given below. Note that c1=6.
kodGreya [7K]

The explicit formula for the geometric sequence c_{n} is

c_{n}=6(\frac{-1}{3})^{n-1}

Step-by-step explanation:

The formula of the nth term of a geometric sequence is

a_{n}=a(r)^{n-1} , where:

  • a is the first term of the sequence
  • r is the common ratio between the consecutive terms

The geometric sequence of c_{n} is 6 , -2 , \frac{2}{3} , \frac{-2}{9} , \frac{2}{27}

∵ c_{1} = 6

∵ r=\frac{c_{2}}{c_{1}}

∵ c_{2} = -2

∴ r=\frac{-2}{6}

- Divide both term by 2 to simplify it

∴ r=\frac{-1}{3}

∵ c_{n}=c_{1}(r)^{n-1}

- Substitute the value of c_{1} and r in the rule above

∴ c_{n}=6(\frac{-1}{3})^{n-1}

The explicit formula for the geometric sequence c_{n} is

c_{n}=6(\frac{-1}{3})^{n-1}

Learn more:

You can learn more about the geometric sequence in brainly.com/question/1522572

#LearnwithBrainly

6 0
3 years ago
I want to cancel. Never used app
Alborosie

Answer:

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Step-by-step explanation:

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3 years ago
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ASAP PLS HELP ME FAST HURRY
stich3 [128]
Sorry it took me so long. You’re going to use multiplication to find acts in the situation both of these equations
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3 years ago
48 people attended the Sunday matinee to watch a film. .Three over 8 of the people went to see a romantic comedy. .One over six
never [62]

Answer:

22 people saw an horror movie

Step-by-step explanation:

Total people who attended the Sunday matinee = 48

People who saw romantic comedy = 3/8 of 48

= 3/8 × 48

= (3*48) / 8

= 144 / 8

= 18 people

People who saw action movie = 1/6 of 48

= 1/6 × 48

= 48/6

= 8 people

People who saw horror movie = x

Total people who attended the Sunday matinee = People who saw romantic comedy + People who saw action movie + People who saw horror movie

48 = 18 + 8 + x

48 = 26 + x

Subtract 26 from both sides

48 - 26 = 26 - 26 + x

22 = x

x = 22 people

22 people saw an horror movie

7 0
3 years ago
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