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Dovator [93]
3 years ago
15

You have a $90 gift card for a coffee shop. each day you use the card to get a coffee for $4.20. what is the value of the card a

fter buying 8 coffees ?
Mathematics
1 answer:
sergey [27]3 years ago
7 0
The answer is $56.40
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An exponential function is graphed for all real numbers. This includes which of the following sets of numbers?
anygoal [31]

<span>In addition to linear, quadratic, rational, and radical functions, there are exponential functions. Exponential functions have the form f(x) = <span>bx</span>, where b > 0 and b ≠ 1. Just as in any exponential expression, b is called the base and x is called the exponent.</span>

 

<span>An example of an exponential function is the growth of bacteria. Some bacteria double every hour. If you start with 1 bacterium and it doubles every hour, you will have 2x bacteria after x hours. This can be written as f(x) = 2x.</span>

 

<span>Before you start,   f(0) = 2<span>0 </span>= 1</span>

<span>After 1 hour           f(1) = 21 = 2</span>

<span>In 2 hours              f(2) = 22 = 4</span>

<span>In 3 hours              f(3) = 23 = 8</span>

and so on.

 

 

<span>With the definition f(x) = <span>bx</span> and the restrictions that b > 0 and that b ≠ 1, the domain of an exponential function is the set of all real numbers. The range is the set of all positive real numbers. The following graph shows f(x) = 2x.</span>

<span> </span>

8 0
3 years ago
If y varies inversely asx, and y = 33 when x = 7 what is the constant and what is value of y when x=11?
allsm [11]

Answer:

We have that y = 21 when x = 11.

Step-by-step explanation:

We solve this question by proportions, using a rule of three.

Since they vary inversely, we apply the inverse rule of three, that is, with lateral multiplication instead of diagonal.

33 - 7

y - 11

So

11y = 33 -7

y - 11

Dividing both sides by 11

Y = 3 * 7 = 21

We have that y = 21 when x = 11.

7 0
2 years ago
Which linear inequality represents the solution set graphed?
SCORPION-xisa [38]
The answer is B I agree with him/her
6 0
2 years ago
Please answerr will mark the brainliest!!!!
Pachacha [2.7K]

Answer:

Octagon ; Regular

Step-by-step explanation:

The polygon has 8 sides and all the sides are of equal measurement.

Hope this helped you!!

Please mark as Brainliest!!

6 0
3 years ago
A bowling alley charges x dollars per guest and a fixed $50 rental fee for parties. Which equation represents the total cost,y,
dmitriy555 [2]

Answer:

y = 9x + 50

Step-by-step explanation:

No choices but an equation would be:

y = 9x + 50

4 0
3 years ago
Read 2 more answers
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