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3 years ago

Evaluate the expression 5x – 3x for x = 2. The x are exponents

Mathematics

1 answer:

umka21 [38]3 years ago

8 0

Answer: True. Subtract 3 from 5 and you get x=2

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mash [69]

Answer:

3/8 is terminating decimal number. It's decimal value is 0.375

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3 years ago

Six friends went to a hockey game. The price of admission per person was $x. Four of the friends bought a soda for $2. Write and

Citrus2011 [14]

6x+4 (2). The expression simplifies to 6x+8

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4 years ago

What is 111111/1000000 simplified

pychu [463]

.11 repeating or 11.11%

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3 years ago

Help me plsssssssssssssssssss

kotykmax [81]

Answer:

The function that best models the given data is;

B. h(t) = -6.73·t² + 14.19·t + 0.83

Step-by-step explanation:

The data in the given table is presented as follows

$\begin{array}{cccccc}Time, \, t(s)&0&0.5& 1.0 & 1.5& 2.0\\Height, \, h \, (m) & 1.0 & 5.42 & 9.71 & 5.9 & 2.6\end{array}$

Where;

Time, t(s) is the independent variable

Height, h(m) is the dependent variable

Therefore, we have;

When t = 0, h = 1.0

From the given functions, we have the following table of the result of the function generated with Microsoft Excel

$\begin{array}{cccccc}\\t & h & A & B & C& D\\0 & 1.0 & 1.22 & 0.83& 0.83& 1.22\\0.5 & 5.42 & 5.26 & 6.2425 & 9.6075 & 10.17\\1 & 9.71 & 4.39 & 8.79 & 21.75 & 24.03 \\ 1.5 & 5.9 & -1.39& 6.9725& 37.2575 &42.8\\2& 2.6 & -12.08 & 2.29 & 56.13 & 66.48\end{array}$

By comparison, the function that nest models the given data is the function 'B', given as follows;

h(t) = -6.73·t² + 14.19·t + 0.83.

3 0

3 years ago

A 100-gram sample of a radioactive isotope decays at a rate of 6% every week. How much of the sample will be left one year from

Dvinal [7]

4 grams sample will be left after 1 year

Step-by-step explanation:

The decay function for percentage decay is given by:

$y =a (1-r)^x$

Here,

a is the initial value

r is the rate

x is the number of time periods

Given

Initial value = 100 grams

Rate = 6% = 0.06

Time = 1 year = 52 weeks

Putting the values in the formula

$y = 100 (1-0.06)^{52}\\y = 100(0.94)^{52}\\y = 4.00\ grams$

Hence,

4 grams sample will be left after 1 year

Keywords: Decay, percentage

Learn more about decay functions at:

#LearnwithBrainly

7 0

3 years ago