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
Brilliant_brown [7]
3 years ago
11

Prove that 3999991 is not prime

Mathematics
1 answer:
rodikova [14]3 years ago
7 0

3999991=4000000-9=2,000^2-3^2=(2000-3)(2000+3)=1997\cdot2003

As we can see, the number 3999991 can be expressed as a product of two numbers that are not 1 and the number 3999991 itself, therefore that number is not prime.

You might be interested in
Heyyy please help FACTORISE (x-x)​
ratelena [41]

Answer:

The answer is death :/

LOL JK JK JK

The answer is 0

Brainiliest tho?

8 0
3 years ago
Help I will be marking brainliest!!!
Keith_Richards [23]
<h3>Answer:  A.  18*sqrt(3)</h3>

=============================================

Explanation:

We'll need the tangent rule

tan(angle) = opposite/adjacent

tan(R) = TH/HR

tan(30) = TH/54

sqrt(3)/3 = TH/54 ... use the unit circle

54*sqrt(3)/3 = TH .... multiply both sides by 54

(54/3)*sqrt(3) = TH

18*sqrt(3) = TH

TH = 18*sqrt(3) which points to <u>choice A</u> as the final answer

----------------------

An alternative method:

Triangle THR is a 30-60-90 triangle.

Let x be the measure of side TH. This side is opposite the smallest angle R = 30, so we consider this the short leg.

The hypotenuse is twice as long as x, so TR = 2x. This only applies to 30-60-90 triangles.

Now use the pythagorean theorem

a^2 + b^2 = c^2

(TH)^2 + (HR)^2 = (TR)^2

(x)^2 + (54)^2 = (2x)^2

x^2 + 2916 = 4x^2

2916 = 4x^2 - x^2

3x^2 = 2916

x^2 = 2916/3

x^2 = 972

x = sqrt(972)

x = sqrt(324*3)

x = sqrt(324)*sqrt(3)

x = 18*sqrt(3) which is the length of TH.

A slightly similar idea is to use the fact that if y is the long leg and x is the short leg, then y = x*sqrt(3). Plug in y = 54 and isolate x and you should get x = 18*sqrt(3). Again, this trick only works for 30-60-90 triangles.

4 0
3 years ago
12 Kendrick wants to build a slide for his son in the backyard. He buys a
pantera1 [17]
5^2 + x^2=8^2
25+x^2=64
X=6.2
6 0
3 years ago
I need the answer for this asp.
TEA [102]

Answer:

This is Isosceles Right

Step-by-step explanation:

An Isosceles is a triangle that has two sides the same length and one side longer or shorter

An Right is an triangle with a 90˚

Hope this helps!

3 0
2 years ago
Read 2 more answers
I need help with this question about similar triangles
Colt1911 [192]

Answer:

ST = 12 units

Step-by-step explanation:

Δ RAS and Δ TES are similar triangles, thus the ratios of corresponding sides are equal, that is, noting that SR = 21 - ST, thus

\frac{ST}{SR} = \frac{TE}{AR} substitute values

\frac{ST}{21-ST} = \frac{8}{6} ( cross- multiply )

6ST = 8(21 - ST)

6ST = 168 - 8ST ( add 8ST to both sides )

14ST = 168 ( divide both sides by 14 )

ST = 12

6 0
3 years ago
Other questions:
  • A car is going at 80 mph. how long will it take to cover 20 miles
    6·1 answer
  • Least common multiple of 5 and 6
    6·2 answers
  • What is the total surface area?
    15·2 answers
  • The average rate of change of g(x) between x = 4 and x = 7 is 7. Which statement must be true? ​
    8·1 answer
  • PLEASE ANSWER WILL GIVE BRAINLIEST!!!!!!!!!! SHOW YOUR WORK. MATH!
    15·1 answer
  • .48 divided by 9.23 rounded to the nearest tenth
    11·1 answer
  • Is this a function or not a function​
    11·1 answer
  • A number cube has faces numbered 1 to 6.
    5·2 answers
  • 67 x=? <br> Please help!
    10·1 answer
  • Which expressions are equivalent to
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!