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Leona [35]
3 years ago
5

Which statement is true about the domain of y = 3(2^-x)? Explain.

Mathematics
1 answer:
SVEN [57.7K]3 years ago
8 0
We want to determine the domain of {y=3 \cdot 2^{-x}=3 \cdot ({2^{-1}})^x=3 \cdot ({ \frac{1}{2}})^x

any function of the form y=f(x)=a \cdot b^x is called an "exponential function",
the only condition is that b is positive and different from 1, and a is a nonzero real number.

The domain of such functions is all real numbers.

That is for any x, the expression <span>3(2^-x) "makes sense".



Answer: </span><span>The domain is all real numbers</span>
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Answer:

The value x in the equation 50=14+x+7+2x-1 is 10

Step-by-step explanation:

Given that the length of one side of a triangle is 14 inches

Let a be the length of one side

Therefore a=14 inches

The length of second side in x+7 inches

Let b be the length of second side

b=x+7 inches.

The length of third side is 2x-1 inches

Let c be the length of third side

c=2x-1 inches

And perimeter of the triangle =50 inches

Perimeter of a triangle =a+b+c

Equation can be written as

50=14+x+7+2x-1

50=20+3x ( adding the like terms )

Rewritting as below

3x+20=50

3x+20-50=50-50

3x-30=0

3x-30+30=0+30

3x=30

x=\frac{30}{3}

Therefore x=10

The value of x is 10

4 0
2 years ago
Tanya writes the number 7.05. Bryce says he can write a different number using the same digits. Is he correct?
Bad White [126]
Yes, actually a couple:
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3 years ago
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An altitude of a triangle is a perpendicular segment from a vertex to the line containing the opposite side true or false
sashaice [31]
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What is the area of a triangle that has a base of 15 yards and a height of 11 yards?
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