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fiasKO [112]
3 years ago
15

Help me find the answers for number problem 3 please

Mathematics
1 answer:
miv72 [106K]3 years ago
4 0

x + 2y = 5 /* (-1)

3x + 2y = 9

__________

-x - 2y = -5

3x + 2y = 9

add these two equations

_______________

2x = 4

x = 4/2 = 2$ for a hotdog

2y = 5 - x = 5 - 2 = 3 => y = 3/2 = 1.5$ for a hamburger

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Macy's is having a Fall sale where everything is 30% off. Angela has a coupon for an additional 10%
givi [52]

Answer:

$113.40

Step-by-step explanation:

The dress is $180 subtracted by 30% ($54) and is now $126

$126 - 10% which is $12.60 and is now $113.40

5 0
3 years ago
The cost of an iPhone is $899.99 plus 8.5% tax. What is the cost of tax for the iPhone?
Sliva [168]

Answer:

724.0915

Step-by-step explanation:

multiply 899.99 and 8.5 you get 724.0915

hope this helps

7 0
3 years ago
The average profit a local store owner earns on a given day is $960 and is growing
Ostrovityanka [42]

The average profit of the local store is an illustration of an exponential function

The profit function is: y = 960 * (0.9894)^{x}

<h3>How to determine the function</h3>

From the question, we have:

  • Initial value (a) = 960
  • Rate per year (b) = 88%

An exponential function is represented as:

y = ab^x

So, the function that represents the profit per year is:

y = 960 * (88\%)^x

Divide x by 12 to get the monthly rate

y = 960 * (88\%)^{x/12}

Evaluate the exponent

y = 960 * (0.9894)^{x}

Hence, the profit function is: y = 960 * (0.9894)^{x}

Read more about exponential functions at:

brainly.com/question/11464095

6 0
2 years ago
College charges reservation fee of $43 plus $8.40 per hour. Class wants to spend at most $93.40 what is the at most sign
musickatia [10]

Answer:

6

Step-by-step explanation:

y=mx+b

93.40=8.40x+43

the 93 is the amount we want to get to, 8.40 represents the value of each sign and the 43 is the original cost

8 0
3 years ago
Please help i have a quiz and i cant answer some questions.
Olenka [21]

Answer:

#3

Step-by-step explanation:

there is a 2 to one ratio of string to precussion

5 0
3 years ago
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