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Dmitry [639]
3 years ago
12

ANSWER BOTH FOR BRAINLIEST AND THANK U

Mathematics
2 answers:
suter [353]3 years ago
4 0

Answer:

1) D 2)B

Step-by-step explanation:

uysha [10]3 years ago
3 0

the First One

If two numbers are by each other the that means you multiply.

2(30) + 4(8)

D

The Second One

Divide 720 by 60

B

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Evaluate the expression when a=-2 and x=6. \<br><br> 4x-a
Digiron [165]

Answer:

26

Step-by-step explanation:

Given

4x - a ← substitute a = - 2, x = 6 into the expression

= 4(6) - (- 2) [ note - (- ) is equivalent to + ]

= 24 + 2

= 26

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3 years ago
what is the equation in point-slope form of the line that passes through the point (-2,10) and has slope -4
Daniel [21]
-3 8 is your answer
7 0
3 years ago
Need help on this problem
faust18 [17]

Using an exponential function, it is found that:

  • For Country A, the doubling time is of 43 years.
  • For Country B, the growth rate is of 1.9% per year.

<h3>What is the exponential function for population growth?</h3>

The exponential function for population growth is given as follows:

P(t) = P(0)e^{kt}

In which:

  • P(t) is the population after t years.
  • P(0) is the initial population.
  • k is the exponential growth rate, as a decimal.
  • t is the time in years.

For Country A, we have that k = 0.016. The doubling time is t for which P(t) = 2P(0), hence:

P(t) = P(0)e^{kt}

2P(0) = P(0)e^{0.016t}

e^{0.016t} = 2

\ln{e^{0.016t}} = \ln{2}

0.016t = \ln{2}

t = \frac{\ln{2}}{0.016}

t = 43 years.

For Country B, P(36) = 2P(0), hence we have to solve for k to find the growth rate.

P(t) = P(0)e^{kt}

2P(0) = P(0)e^{36k}

e^{36k} = 2

\ln{e^{36k}} = \ln{2}

36k = \ln{2}

k = \frac{\ln{2}}{36}

k = 0.019.

For Country B, the growth rate is of 1.9% per year.

More can be learned about exponential functions at brainly.com/question/25537936

#SPJ1

3 0
1 year ago
What is that first step in solving the equation 2x-1=3?
ddd [48]

Answer:

subtract 1 then divide 2

Step-by-step explanation:

5 0
3 years ago
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What is the value of x in the equation x – y = 30, when y = 15?
slamgirl [31]
Since <span><span>−y</span></span> does not contain the variable to solve for, move it to the right side of the equation by adding <span>y</span> to both sides.<span>x=<span>y+<span>30</span></span></span>
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3 years ago
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