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Lelechka [254]
3 years ago
13

Which of the following is a point on the graph of y=(1/2)^x?

Mathematics
2 answers:
Sidana [21]3 years ago
7 0

The third option is the answer

yan [13]3 years ago
5 0

\bf 1.~(0,0)~\hspace{5em}0=\left( \cfrac{1}{2} \right)^0\implies 0\ne 1\qquad \otimes \\\\\\ 2.~\left( 0,\frac{1}{2} \right)~\hspace{5em}\cfrac{1}{2}=\left( \cfrac{1}{2} \right)^0\implies \cfrac{1}{2}\ne 1\qquad \otimes


\bf 4.~(2,1)~\hspace{5em}1=\left( \cfrac{1}{2} \right)^2\implies 1=\cfrac{1^2}{2^2}\implies 1\ne \cfrac{1}{4}\qquad \otimes \\\\\\ 3.~\left(2,\frac{1}{4}  \right)~\hspace{5em}\cfrac{1}{4}=\left( \cfrac{1}{2} \right)^2\implies \cfrac{1}{4}=\cfrac{1^2}{2^2}\implies \cfrac{1}{4}=\cfrac{1}{4}\qquad \checkmark

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Answer:

3) 109.27

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Step-by-step explanation:

First divide the cost by the number of units to get the individual cost of each item.

Then multiply by the new number of units.

For example:  78.05 ÷ 5 = 15.61 for each.

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there are nickels, dimes, and quarters in a piggy bank. altogether, the coins are worth $3.65. the number of dimes is three time
hoa [83]

This question is solved using a system of equations, and doing this, we get that: There are 9 quarters, 4 nickels and 12 dimes.

I am going to say that:

x is the number of nickels.

y is the number of dimes.

z is the number of quarters.

In all, they are worth $3.65.

A nickel is worth $0.05, a dime is worth $0.1 and a quarter is worth $0.25, so:

0.05x + 0.1y + 0.25z = 3.65

Dimes: 3 times greater than nickels:

This means that:

y = 3x

Quarters: One greater than double the number of nickels:

This means that:

z = 2x + 1

Value of x:

We have y and z as function of x, so we can replace into the equation and find the value of x, so:

0.05x + 0.1y + 0.25z = 3.65

0.05x + 0.1(3x) + 0.25(2x+1) = 3.65

0.05x + 0.3x + 0.5x + 0.25 = 3.65

0.85x = 3.4

x = \frac{3.4}{0.85}

x = 4

y and z:

y = 3x = 3(4) = 12

z = 2x + 1 = 2(4) + 1 = 9

There are 9 quarters, 4 nickels and 12 dimes.

A similar question is found at brainly.com/question/17096268

4 0
2 years ago
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