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
lawyer [7]
3 years ago
6

A flying saucer crashes in a Nebraska cornfield. The FBI investigates the wreckage and finds an engineering manual containing an

equation in the Martian number system: 325 + 42 = 411. If this equation is correct, how many fingers would you expect Martians to have?
Mathematics
1 answer:
anyanavicka [17]3 years ago
6 0

Answer:

6 fingers

Step-by-step explanation:

Let X = the base of the numbers above

If X > 0

Then we have:

325 = 3 * X² + 2 * X¹ + 5 * X°

325 = 3X² + 2X + 5

42 = 4*X¹ + 2*X°

42 = 4X+ 2

And

411 = 4*X²+ 1*X¹ 1*X°

42 = 4X² + X + 1

Since 325 + 42= 11 then

3X² + 2X + 5 + 4X+ 2 = 4X² + X + 1 ------ Collect Like Terms

3X² - 4X² + 2X + 4X - X + 5 + 2 - 1 = 0

-X² + 5X + 6 = 0 ------- Multiply both sides by -1

X² - 5X - 6 = 0 ------- Factorise the Equation

X² - 6X + X - 6 = 0

X(X - 6) + 1( X - 6) = 0

(X + 1)(X - 6) = 0

X + 1 = 0 or X - 6 = 0

X = -1 or X = 6

But X>0

So, X =-1 is invalid

X = 6

The expected number of fingers of the Martian is 6

You might be interested in
Determine whether the statement a through d about f,g and h are true or false
zalisa [80]

Answer:

n

               Step-by-step explanation:n

6 0
3 years ago
3. 1 3/8 × 1 1/2=<br>4. 4 1/2× 2 3/8=<br>5. 1 1/8 × 3 1/2=​
kipiarov [429]

Answer:

2 1/16, 10 11/16, 3 15/16

Step-by-step explanation:

3. 1 3/8 times 1 1/2= 2 1/16

4. 4 1/2 times 2 3/8= 10 11/16

5. 1 1/8 times 3 1/2=  3 15/16

3 0
3 years ago
Which of the following illustrates the truth value of the given statements? January is the first month of the year or December i
Dafna11 [192]
First, the need to determine if the statements are true or false.

1) January is the first month of the year. (This statement is true)
2) December is the last month of the year. (This statement is also true)

With this in mind we can determine that what will illustrate the truth value would be:

T T -> T

In other words, since the first statement is true and the second statement is also true then conjunction of both statements would be true.
5 0
3 years ago
Read 2 more answers
Phoebe, Andy and Polly share £270.
Stella [2.4K]
*Given
Money of Phoebe            - 3 times as much as Andy
Money of Andy                - 2 times as much as Polly
Total money of Phoebe,  - <span>£270
</span>    Andy and Polly

*Solution

Let
B - Phoebe's money
A - Andy's money
L - Polly's money

1. The money of the Phoebe, Andy, and Polly, when added together would total <span>£270. Thus, 
</span>
                  B + A + L  = <span>£270                     (EQUATION 1)

2. Phoebe has three times as much money as Andy and this is expressed as
  
                  B = 3A

3. Andy has twice as much money as Polly and this is expressed as

                  A = 2L</span>                           (EQUATION 2)
<span>
4. This means that Phoebe has ____ as much money as Polly, 

                 B = 3A
                 B = 3 x (2L)
                 B = 6L                            </span>(EQUATION 3)<span>

This step allows us to eliminate the variables B and A in EQUATION 1 by expressing the equation in terms of Polly's money only. 

5. Substituting B with 6L, and A with 2L, EQUATION 1 becomes, 

                  6L + 2L + L = </span><span>£270
</span>                                9L = <span>£270
</span>                                  L = <span>£30

So, Polly has </span><span>£30. 

6. Substituting L into EQUATIONS 2 and 3 would give us the values for Andy's money and Phoebe's money, respectively. 
</span>
                  A = 2L                           
                  A = 2(£30)
                  A = £60

Andy has £60

                  B = 6L                         
                  B = 6(£30)
                  B = £180

Phoebe has £180

Therefore, Polly's money is £30, Andy's is £60, and Phoebe's is £180.
7 0
3 years ago
Which pair is a solution of the equation? <br> -7x+3y=2
stira [4]

Answer:

7/3

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Help me solve <br> 6x+5-3x=26
    6·2 answers
  • Which expression shows the distance on the number line between −12 and 8?
    12·1 answer
  • Navigate three times the difference of 12 and twice some number is equal to 36. find the number.
    12·1 answer
  • 1 5/8 divided by 1 3/5=?
    13·2 answers
  • Plz show how to slove this!
    5·1 answer
  • Which equation represents a linear function?
    8·2 answers
  • THE PROBABILITY OF A FOOTBALL TEAM WINNING A MATCH IS 0.3 THE PROBABILTITY OF THE SAME FOOTBALL TEAM LOSING IS 0.55 WHAT IS THE
    7·1 answer
  • The sum of Ken's, k, and Alan's, a, ages is 62. Ken is 31 years older than Alan.
    11·1 answer
  • The graph shows the system of equations that can be used to solve x cubed + x squared = x minus 1.On a coordinate plane, a line
    5·1 answer
  • THIS ABOUT TO BE OVERDUE PLS HELP ME
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!