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Zigmanuir [339]
3 years ago
12

Tell if each equation represents exponential growth, exponential decay or neither.

Mathematics
1 answer:
scoray [572]3 years ago
3 0

Answer:

Exponential growth A, B;

exponential decay C, E;

neither D.

Step-by-step explanation:

The function y=a\cdot b^x

  • represents exponential growth when b>1;
  • represents exponential decay when 0

A. The equation f(t)=\dfrac{2}{3}\cdot \left(\dfrac{7}{3}\right)^t represents exponential growth, because \dfrac{7}{3}>1.

B. The equation P=22\cdot \left(1.76\right)^x represents exponential growth, because 1.76>1.

C. The equation V=\dfrac{1}{3}\cdot \left(0.45\right)^x represents exponential decay, because 0

D. The equation W=3.2\cdot (x) represents neither exponential growth nor exponential decay, because this function is linear.

E. The equation g(x)=4.2\cdot \left(\dfrac{1}{3}\right)^x represents exponential decay, because 0

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4. What is the system of equations that describes the following graph?
GarryVolchara [31]

Answer:

The system of inequalities is

y

y>0.25x

Step-by-step explanation:

step 1

Find the equation of the dashed line with negative slope

The line passes through the points

(0,-2) and (-2,0)

Find the slope

m=(0+2)/(-2-0)=-1

Find the equation of the line in slope intercept form

y=mx+b

we have

m=-1\\b=-2

substitute

y=-x-2

The solution of the inequality is the shaded area below the dashed line

therefore

The equation of the inequality A is

y

step 2

Find the equation of the dashed line with positive slope

The line passes through the points

(0,0) and (4,1)

Find the slope

m=(1-0)/(4-0)=0.25

Find the equation of the line (direct variation)

y=kx

we have

k=0.25

substitute

y=0.25x

The solution of the inequality is the shaded area above the dashed line

therefore

The equation of the inequality B is

y>0.25x

therefore

The system of inequalities is

y

y>0.25x

4 0
3 years ago
Callie read for 4 hours last week. Luis read 6 times as long. Write an equation to show how long Luis read.
zysi [14]

Answer: 24

Step-by-step explanation:  Multiply 4 by 6 to get 24

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3 years ago
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Semenov [28]

Answer:

ye

Step-by-step explanation:

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3 years ago
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zalisa [80]

Answer:

a. (x+5)^2 = 49

b. (x+7)^2 = (x+1)^2

Step-by-step explanation:

So the term "a number" is always going to be x. input x into the sentences. "X plus five, then squared, is forty-nine". when they do "is __", that means equal to. In the second question, seven more than x is x + 7 (the two numbers are interchangeable here). Equivalent also means equal. hope this helped :)

4 0
3 years ago
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Someone please help, i honestly don’t get how to find the angles
jeyben [28]
A.) the degrees inside the triangles are 50, 70, and 60. you know because 180-120=60
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im not sure if this is correct but i think it is :)

8 0
3 years ago
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