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
Elenna [48]
4 years ago
11

Prove that the value of the expression (125^2+25^2)(5^2–1) is divisible by 3

Mathematics
2 answers:
Radda [10]4 years ago
5 0

Step-by-step explanation:

A =(125^{2} + 25^{2} ) (5^{2} - 1)\\A = [(5^{3})^{2}  + (5^{2})^{2} ] . (5^{2} - 1)\\A = (5^{6}  + 5^{4} ). (5^{2} - 1)\\A = [5^{4} . ( 5^{2}  + 5)].(5^{2} - 1) \\A = 5^{4} . (25+ 5). (5^{2} - 1)\\A = 5^{4} . 30. (5^{2} - 1)\\

Since 30 is divisible by 3

Thus, A is divisible by 3

Good luck!

shtirl [24]4 years ago
3 0

(125^2+25^2)(5^2-1)=\\\\=(125^2+25^2)(25-1)=\\\\=(125^2+25^2)\cdot24=\\\\=(125^2+25^2)\cdot8\cdot{\bold{\underline3}}

125 and 25 are integer ⇒125² and 25² are integer ⇒(125²+25²) is integer

One of factors of given expression  is 3 so given expression  is divisible by 3

                                            q.e.d.  

You might be interested in
We need a step by step answer to 2(3 d-1)
Effectus [21]
First figure out what it mean
7 0
3 years ago
You are making fruit baskets using 54 apples, 36 oranges, and 73 bananas. a. Explain why you cannot make identical fruit baskets
GrogVix [38]
Question 1:
73 is a prime number. It can only be divided by 1 and by itself. 

The GCF of the three numbers:
 54                               36                            73
1×54                           1×36                          1×73
2×27                          2×18
3×18                           3×12
6×9                            4×9
                                   6×6

GCF of 54, 36 and 73  is 1

GCF of 54 and 36 is 18

If we divide 54 apples into 18 baskets, we have 3 apples in each basket
If we divide 36 oranges into 18 baskets, we have 2 oranges in each basket
If we divide 73 bananas into 18 baskets, we have 4 bananas in each basket + one banana left over.

So the greatest number of identical fruit baskets we can make with the least amount of fruit left over is 18 baskets
6 0
3 years ago
Alexa and her children went into a movie theater where they sell bags of popcorn for $8 each and pretzels for $5 each. Alexa has
never [62]

Answer:

xx times yy=270

Step-by-step explanation:

3 0
3 years ago
PLEASE HELP!!! So the answer I got was 19.14 however that is not the correct answer. How do I solve this problem. Not sure what
Mamont248 [21]

Check the picture below.

so we know the radius of the semicircle is 2 and the rectangle below it is really a 4x4 square, so let's just get their separate areas and add them up.

\stackrel{\textit{area of the semicircle}}{\cfrac{1}{2}\pi r^2}\implies \cfrac{1}{2}(\stackrel{\pi }{3.14})(2)^2\implies 3.14\cdot 2\implies 6.28 \\\\\\ \stackrel{\textit{area of the square}}{(4)(4)}\implies 16 \\\\[-0.35em] ~\dotfill\\\\ ~\hfill \stackrel{\textit{sum of both areas}}{16+6.28=22.28}~\hfill

3 0
3 years ago
Sienna is solving the quadratic equation by completing the square.
pantera1 [17]

Answer:

See below

Step-by-step explanation:

3 (x^2 + 3x) = 4

3 ( x + 3/2)^2   = 4 + 27/4  

4 0
2 years ago
Other questions:
  • Draw a place value chart for 498,274,163. Label the periods and the place values within each period
    12·2 answers
  • Solve for x: x^2 = 289<br>step by step​
    12·2 answers
  • Each letter in the expression shown to the right represents a digit other than zero. Different letters represent different digit
    10·1 answer
  • The punch has 7 1/2 gallons of juice mix for every 1 1/4 gallons of fresh fruit juice. How many gallons of juice mix are used pe
    6·1 answer
  • You have a set of cards labeled 1-10. Set A is drawing an even card. Set B is drawing a 8 or higher.  What is the  P ( A ∪ B ) ?
    6·1 answer
  • Can you please help me with these three for my timed test I have rn. And maybe show your work too please!! Thank you :)
    9·1 answer
  • Y=3x-10<br> 2x-5=y<br> plz help me with this and show the work plz i need it for my test
    5·1 answer
  • What is the slope of a line parallel to the line whose equation is x+2y=2
    12·1 answer
  • Can someone please help me with math.
    14·1 answer
  • -
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!