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
Nataly [62]
2 years ago
10

Hey i know this question is linked to Pythagorean theorem but i am still confused. So, please help me if you can ❤️

Mathematics
2 answers:
qwelly [4]2 years ago
7 0

Answer:

a = -10, b = 18

Step-by-step explanation:

The Pythagorean Theorem is, indeed, involved.  Use it to find an expression (you won't get a number!) for the height of the rectangle.

Using the right triangle, one leg has length  x  and hypotenuse length 8.  for a moment, label the height  h.  Then

x^2+h^2=8^3\\\\h^2=64-x^2\\\\h=\sqrt{64-x^2}

This expression tells the height of the rectangle, so it is the length of the two vertical sides.  The top and bottom sides each have length x.

Perimeter = 20 says that the total length of all the sides is 20.  Set that up and do a heap of algebra!

x+x+\sqrt{64-x^2}+\sqrt{64-x^2}=20\\\\2x+2\sqrt{64-x^2}=20

Divide by 2 (to simplify a bit).

x +\sqrt{64-x^2}=10

Subtract x to get the square root by itself (you'll see why in the next step).

\sqrt{64-x^2}=10-x

Square both sides of the equation.

(\sqrt{64-x^2})^2=(10-x)^2\\\\\\64-x^2=100-20x+x^2\\\\64=100-20x+2x^2\\\\0=36-20x+2x^2

Divide by 2 again (because you can)

0=18-10x+x^2

Rearrange terms to match the order in the question.

x^2-10x+18=0

The coefficient of  x  is  a = -10.  The constant is  b = 18.

antiseptic1488 [7]2 years ago
6 0

Step-by-step explanation:

From Pythagorean theorem, one of the sides can be determined as x^2 + y^2 =8^2

or y = (8^2 - x^2)^(1/2)

we can write the perimeter P as

P = 2x + 2y ---> 20 = 2x + 2(8^2 - x^2)^(1/2)

Dividing by 2, we get

10 = x + (8^2 - x^2)^(1/2)

Move the x to the other side,

10 - x = (8^2 - x^2)^(1/2)

Take the square of both sides to get rid of the radical sign:

(10 - x)^2 = 8^2 - x^2

Move everything to the left and expand the quantity inside the parenthesis:

x^2 + (100 - 20x + x^2) - 64 = 0

2x^2 - 20x + 64 = 0

or

x^2 - 10x + 32 = 0

Now we can see that a = -10 and b = 32

You might be interested in
Which survey is biased?
scoundrel [369]

Answer:

b

Step-by-step explanation:

alotta ppl go to the mall cuz they like to shop there, so if u ask ppl at the mall their fav place to shop, many will say "the mall"

4 0
2 years ago
Read 2 more answers
Simplity (4^-2)^5<br> A.1/4^10<br> B. 4^3<br> C.1/4^3<br> D. 4^10
Goshia [24]

Answer:

(4^{-2})^5=\dfrac{1}{4^{10}}

Step-by-step explanation:

The given expression is : (4^{-2})^5

We need to simplify the above expression.

We know that, x^{-a}=\dfrac{1}{x^a}

or

(4^{-2})^5=(\dfrac{1}{4^2})^5\\\\=\dfrac{1^5}{(4^2)^5}\\\\\because (x^b)^c=x^{b\times c}\\\\=\dfrac{1}{4^{10}}

So, the simplified form of the given expression is \dfrac{1}{4^{10}}. Hence, the correct option is (A).

5 0
3 years ago
Read 2 more answers
What is another to describe an equilateral triangle . PICK BELOW
krok68 [10]
The answer is a right triangle meaning that all sides and angles are equal.
7 0
3 years ago
Read 2 more answers
Francine has a picture that is 5/2 its width. She wants to enlarge the picture to have an area of 490 in2. What will the dimensi
serg [7]

Answer:

Length = 2w

Width= w

2w times w= 241

2W^2=241

Divide by 2

W-^2=121

Sq rt each side

W-= 11 cuz 11 times 11=121

hope this helped

If it did, brainliest would be appreciated!

5 0
2 years ago
Please help me for 50 points
lidiya [134]

Answer:

why why why humm why why why why

4 0
2 years ago
Read 2 more answers
Other questions:
  • Since a middle school? opened, the girls' basketball team has had the same record every season. The team has won a total of 156
    11·1 answer
  • How can a cyclist minimize friction as he or she rides?
    11·1 answer
  • Drag each equation to the correct location on the table.
    13·1 answer
  • Logan drew 4 hearts and 40 circles. What is the ratio of hearts to al shapes?
    13·2 answers
  • the population of a school is 400 students. Next year it is expected to be about 120% of what it is now. Choose next year's stud
    11·1 answer
  • Peanuts are $2 a pound and raisins are $4 a pound. Julian bought a 7 pound mixture of peanuts and raisins for $20. How many poun
    7·1 answer
  • Find the value of x.<br> X<br> 5x - 9<br> 3x + 15
    10·1 answer
  • 2 sides of a triangle have the following measures. Find the range of possible measures for the third side.
    9·1 answer
  • Roy used 1/4 of his money on 3 pens and 6 notebooks. The cost of each pen is 3 times the cost of each notebook. He bought some m
    11·2 answers
  • Whats the answer for this...?<br> Ive tried 6 times in total, i just gave up :l
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!