1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
DiKsa [7]
3 years ago
15

Three friends say they are friends A,B and C and they want to buy a teacher a gift so they each put in $10($30 total) and a four

th friend say he is friend D and uses the money and buys a $25 gift and has $5 left and gives each of the three friends $1 back so they technically used $9 each but 9x3=27 and there is $2 left from the $5 but 27+2=29 so when is the last dollar like how does this work?
Mathematics
1 answer:
vlada-n [284]3 years ago
4 0

Answer:

Step-by-step explanation:

You are using the wrong accounting system

Forget the nine dollars.

If the thing bought was 25 dollars, then each one of A B and C put in 25/3 = 8.3333 dollars. If 1 dollar each was going back, then the sum became 9 1/3 dollars. 3 * 9 1/3 = 27 + 1 = 28. There is 2 dollars left. Everything is fine.

25 + 3 = 28

The three each got 1 dollar back. But the total accounted for is 25 + 3 = 28

There's 2 left over. That makes 30. Everything's fine. There is no missing dollar.

You might be interested in
Which is a factor of the polynomial f(x) = 6x4 – 21x3 – 4x2 + 24x – 35?
QveST [7]
<span>I note that this problem starts out with "Which is a factor of ... "  This implies that you were given several answer choices.  If that's the case, it's unfortunate that you haven't shared them.

I thought I'd try finding roots of this function using synthetic division.  See below:

f(x) = 6x^4 – 21x^3 – 4x^2 + 24x – 35
Please use " ^ " to denote exponentiation.  Thanks.

Possible zeros of this poly are factors of 35:  plus or minus 1, plus or minus 5, plus or minus 7.  Use synthetic division; determine whether or not there is a non-zero remainder in each case.  If none of these work, form rational divisors from 35 and 6 and try them:  5/6, 7/6, 1/6, etc.

Provided that you have copied down the function 
</span>f(x) = 6x^4 – 21x^3 – 4x^2 + 24x – 35  properly, this approach will eventually turn up 1 or 2 zeros of this poly.  Obviously it'd be much easier if you'd check out the possible answers given you with this problem.

By graphing this function, I found that the graph crosses the x-axis at 7/2.  There is another root.

Using synth. div. to check whether or not 7/2 is a root:

         ___________________________
7/2   /   6    -21    -4    24    -35
                   21      0   -14     35           
        ----------- ------------------------------
           6        0     -4    10       0

Because the remainder is zero, 7/2 (or 3.5) is a root of the polynomial.  Thus, (x-3.5), or (x-7/2), is a factor.

7 0
2 years ago
Read 2 more answers
Rational numbers to -17/10
enyata [817]

Answer:

-17/10 is 1.7 is a rational number

Step-by-step explanation:

In mathematics, a rational number is any number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number. ... Moreover, any repeating or terminating decimal represents a rational number.

6 0
2 years ago
I’ll mark as brainliest i really need an answer fast
Vinil7 [7]

Answer:

(X-3)^2 - 4

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
I need help plss. I will give you a lot of points I promise
Alekssandra [29.7K]
Slope=0.005/2.000=0.002
p - intercept = 974/1 = 974.00000
n- intercept = 974/-404 = 487/-202 = -2.41089


Oh and it is ok if you don’t have a lot of points I am great full for the points you are giving me and the answer is C)13,094 and can I have the brainliest since the other guy clearly did not answer the question right I only have one brainliest ☺️
8 0
3 years ago
Read 2 more answers
HELP i cant really understand how to work it out... its algebra btw.
marishachu [46]

Answer:

A because you can go into the numbers evenly

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • What is the exponent of 105cm=1.05m
    9·1 answer
  • Please Help!!!
    15·1 answer
  • One positive number is 4 more than twice another. Their product is 198
    6·2 answers
  • In the diagram below, is the perpendicular bisector of JK. Which of the following statements must be true?
    11·1 answer
  • |x-4|=1 <br> answer and reason fast
    13·1 answer
  • An environmentalist is studying a certain microorganism in a sample of city lake water. The function h(x) = 146(1.16)ˣ gives the
    10·1 answer
  • Five less than 3 times a number is 25. What is the number?
    9·2 answers
  • 1/3 divided by 4 = what
    9·2 answers
  • Jackie weighed an Amazon box that was delivered to her home.The box weighed 192 ounces.How much does the box weight in pounds
    7·1 answer
  • Teresa earns $8.23 per hour. Calculate her wage for a week where she<br> works 14h 30min.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!