Allison is selling and buying baseball cards online. She sells each card for 3.25 and buys each card for 5.50. If she sold 4 cards, and brought 7 cards, did she end up making or spending money did she spend or make

Answers

Answer 1

Answer: She did not make a profit, if that is what you're asking :)

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Make c the subject of the formula:A=b+cd

Y=-5
5x+4y=-20
it say solve by substitution

Answers

$y=-5\n5x+4y=-20 \n\n5x+4 \cdot (-5)=-20 \n\n5x-20=-20\ \ | \ add\ 20\ to\ both\ sides \n\n5x=0 \ \ | \ divide \ both \ sides\ by\ 5\n\nx=0$

5x + (4 · -5) = -20
5x - 20 = -20
5x = 0
x = 0

640, 160, 40, 10, ...Which correctly describe the graph of the geometric sequence? Check all that apply.

The graph will show exponential growth.

The graph will appear linear.

The domain will be the set of natural numbers.

The range will be the set of natural numbers.

The graph will show exponential decay.

Answers

Answer:

Option 3 and 5 are correct

Step-by-step explanation:

We have given a geometric series 640,160,40,10....

Common ratio of geometric series is $r=(a_2)/(a_1)$

$r=(160)/(640)=(1)/(4)<0$

Here our common ratio is less than zero

It will show the graph of exponential decay

Hence, option 5 is correct.

The general term of geometric series is $a_n=a\cdotr^(n-1)$

Domain will be all natural numbers since, geometric series take only natural numbers.

Here, values of "n" is domain

Hence, option 3 is correct.

Range can be any positive real numbers not only natural number

Range is the value of $a_n$

Hence, option 4 is discarded.

Graph can not be linear of a geometric series being exponential

Hence, option 2 is discarded.

Option 1 is discarded because it is exponential decay function so it can not be exponential growth.

Therefore, Option 3 and 5 are correct.

Answer:

The options that hold true are:

The domain will be the set of natural numbers.

The graph will show exponential decay.

Step-by-step explanation:

We are given a geometric sequence as:

640, 160, 40, 10, ...

Clearly we see that each term is decreasing at a constant rate as compared to it's preceding term.

Hence, the graph formed by this sequence will be a exponential graph with decay .

( since, the terms of the sequence are decreasing)

The sequence could be modeled as:

Let $a_n$ represents the nth term of the sequence.

Hence,

$a_n=640\cdot (1)/(4^(n-1))$

As, the sequence is geometric hence the domain will be a set of natural numbers.

but the range will be positive real numbers.

Hence, the correct option is:

The domain will be the set of natural numbers.

The graph will show exponential decay

7) Original price: ?
Discount: 25%
Sale price:
$28

Answers

Answer:

Step-by-step explanation:

let be x the price before the discount

original price= 28/(1-0.25)=28/0.75=37.33

original price=37.33

Answer:

37.3

Step-by-step explanation:

The original price = x which represents 100% of the price. So we subtract 100%-25, which is 100-25=75 or 75%(0.75)

So, $28 is 75% off the original price.

28 divided by .75 = 37.3

Then, 37.3 would be the original price.

Multiple choice answer pls find the correct

Answers

Answer:

b 29

Step-by-step explanation:

because the angle b and c are the same so both are 100 and that means both angles d and e are the same so add those to angles together get 151

a triangle is equal to 180 so subtract the number 151 from 180 to get your answer then your answer will be 29

Answer:

Step-by-step explanation:

180=100 +51 + 29

2. Over a four-week period, Gail earned the following commissions? Week 1 $250.00 Week 2 310.00 Week 3 275.00 Week 4 195.00 What was her average weekly commission for the period?

Answers

$250.00+ $310.00+ $275.00+ $195.00= $1,030.

$1,030 / 4 weeks = $257.50/ week.

Her average weekly commission for the period is $257.50/ week.

Hope this helps~

♥ To find out this we have our formula:
$250.00+ $310.00+ $275.00+ $195.00
Now if we solve that:
$1,030
Now divide by 4 because there are 4 total weeks
$1,030 / 4 weeks
Solve that:
$257.50 a week is her average.

A store manager did a study to determine the amount of money the first 50 customers spent in her store. The data are approximately normally distributedwith a mean of $29.60 and a standard deviation of $10.50. The formula for normalizing data is: Z= (X−μ / σ) Z is the normal score X is a discrete data value μ is the mean σ is the standard deviation Determine the probability that a customer spent over $35. Enter your answer as a decimal to the hundredths place.

Answers

Simply input the data given, using the mentioned formula.
X=$35.00
μ=$29.60
σ=$10.50

Z= (X−μ / σ)
^^ This formula is actually wrong though... the correct way to write it is:

Z= (X−μ) / σ
Z=(35.00-29.60)/10.50
Z=5.4/10.50
Z=0.51

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