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2 years ago

3(2a+b) for b=4 and a=a

Mathematics

2 answers:

Kamila [148]2 years ago

8 0

Answer:

I miss the rage

Step-by-step explanation:

YAAAAAAAAAAAAAAAAAAAAAAA

creativ13 [48]2 years ago

5 0

Answer:

6a+12.

Step-by-step explanation:

a=a and b=4

=6a + 3b

=6a+3×4

=6a+12.

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sdas [7]

the answer is nine

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Emerson purchased a game that was on sale for 18% off. The sales tax in his county is 8%. Let y represent the original price of

kolezko [41]

Answer:

(y-18%) + (y+8%)

Step-by-step explanation:

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2 years ago

A wooden artifact from an ancient tomb contains 20 percent of the carbon-14 that is present in living trees. How long ago, to th

maxonik [38]

Answer:

The artifact was made approximately 13,306 years ago

Step-by-step explanation:

The half-life of Carbon-14 = 5730 years

The formula for radioactive decay is given by the equation:

$N=N_0 e^{- \lambda t}\\where:\\N = Number\ of\ particles\ at\ time\ t\\N_0= Number\ of\ particles\ at\ time\ t_0\\\lambda = decay\ constant = \frac{In}{t_{1/2}} ; t_{1/2} = half-life\\t = time\ in\ years$

The amount of Carbon-14 left = 20% = 20/100 = 0.2

$\therefore \frac{N}{N_0} = 20 \% = 0.2$

$N=N_0 e^{- \lambda t}\\\\dividing\ both\ sides\ by\ N_0\\\frac{N}{N_0} = e^{- \lambda t}\\0.2 = e^{- \lambda t}\\taking\ natural\ logarithm\ of\ both\ sides\\In 0.2 = Ine^{- \lambda t}\\In0.2 = -\lambda \times t\\but\ \lambda = \frac{In2}{t_{1/2}} \\\therefore In0.2 = -\lambda \times t\\\\= In0.2 = - \frac{In2}{t_{1/2}} \times t\\where\ t_{1/2} = 5730\ years\\-1.6094 = - \frac{0.6931}{5730} \times t\\-1.6094 = - 0.00012095 \times t\\t = \frac{-1.6094}{-0.00012095} \\t = 13,306.32$

t ≈ 13,306 years

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2 years ago

What is the domain of the relation?<br>{(-3, - 4), (-1, 2), (0, 0), (1, 3), (5, 4)]

mezya [45]

The domain are the X values.

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The scores on a test given to all Júniors in a school district are normally distributed with a mean of 74 and a standard deviati

earnstyle [38]

Answer:

got to get some point for my questions sorrry

Step-by-step explanation:

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3 years ago