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
Mama L [17]
3 years ago
14

A triangle has sides of lengths 9, 7, and 12. Is it a right triangle? Explain.

Mathematics
1 answer:
Tresset [83]3 years ago
8 0

Answer:

No, 9^2 +7^2 \neq 12^2

Step-by-step explanation:

9^2 +7^2 = 81+ 49 =130...(1)

12^2 = 144...(2)

From equations (1) & (2) it is obvious that:

9^2 +7^2 \neq 12^2

Thus, the given is not a right triangle.

You might be interested in
Which expressions are equivalent to -2(5x-3/4)?
kogti [31]

Answer:

-10x+3/2

Hope this helps

6 0
2 years ago
Henry packed some apples in a box. The total mass of the box and the apples was 16 240 g. He packed some strawberries in a simil
icang [17]

Step-by-step explanation:

x = mass of apples

y = mass of strawberries

z = mass of the box

x = 3y

x + z = 16240

y + z = 6350

let's subtract the second from the first equation

x + z = 16240

- y + z = 6350

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

x - y + 0 = 9890

using the first identity in that result gives us

3y - y = 9890

2y = 9890

y = 4,945 g

x = 3y = 3×4945 = 14,835 g = the mass of the apples

3 0
2 years ago
There are 2.54 centimeters to 1 inch. how many centimeters are in 15 inches
Rainbow [258]
15*2.54 = 38.1

Cause theres 15 of them
8 0
3 years ago
Read 2 more answers
Factor completely x^8- 16.
Nataly_w [17]

Answer:

Step-by-step explanation:


So in this example we'll be using the difference of squares which essentially states that: (a-b)(a+b)=a^2-b^2 or another way to think of it would be: a-b=(\sqrt{a}-\sqrt{b})(\sqrt{a}+\sqrt{b}). So in this example you'll notice both terms are perfect squares. in fact x^n is a perfect square as long as n is even. This is because if it's even it can be split into two groups evenly for example, in this case we have x^8. so the square root is x^4 because you can split this up into (x * x * x * x) * (x * x * x * x) = x^8. Two groups with equal value multiplying to get x^8, that's what the square root is. So using these we can rewrite the equation as:

x^8-16 = (x^4-4)(x^4+4)

Now in this case you'll notice the degree is still even (it's 4) and the 4 is also a perfect square, and it's a difference of squares in one of the factors, so it can further be rewritten:

x^4-4 = (x^2-2)(x^2+2)

So completely factored form is: (x^2-2)(x^2+4)(x^4+4)

I'm assuming that's considered completely factored but you can technically factor it further. While the identity difference of squares technically only applies to difference of squares, it can also be used on the sum of squares, but you need to use imaginary numbers. Because x^2+4 = x^2-(-4). and in this case a=x^2 and b=-4. So rewriting it as the difference of squares becomes: x^4+4 = x^4 - (-4) = (x^2-\sqrt{-4})(x^2+\sqrt{-4}) = (x^2-2i)(x^2+2i) just something that might be useful in some cases.

7 0
1 year ago
Read 2 more answers
Twice the difference of a number and 1 is 4 more than that number. Find the numbers using Polyas 4 step
const2013 [10]

Answer:

6

Step-by-step explanation:

2 times the difference of a number and 1 = 4 plus that number

In other to express the word problem Mathematically ; let the number = x

2(x - 1) = 4 + x

Expand

2x - 2 = 4 + x

Collect like terms

2x - x = 4 + 2

x = 6

Hence, the number is 6

4 0
2 years ago
Other questions:
  • 5(6x+7y)=6•82 ???????
    5·1 answer
  • Triple A number is the same as double the number increased by 5
    5·2 answers
  • Write the fraction as a decimal.<br> 310
    14·2 answers
  • What is 6/12 in simplist form?
    5·1 answer
  • If f(x)=2x^2+3 and g(x)=x-2, what is (f+g)(2)?
    6·2 answers
  • How do you find out a Pythagorean triple?
    7·1 answer
  • Find the slope of the line passing through the points (3, -2) and (1, -8).
    13·1 answer
  • What is the greatest common factor of 120 and 168
    9·2 answers
  • Suppose a tank leaks toxic chemicals. The area affected is a circle centered on the tank. When the spill is first noticed, the c
    12·1 answer
  • Find the probability. You flip a coin and then roll a fair six-sided die. The coin lands heads-up and the die shows a number fro
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!