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
kifflom [539]
3 years ago
12

Solve x^2 + y^2 = 81 for x. Show solution steps.

Mathematics
1 answer:
Charra [1.4K]3 years ago
7 0

Answer:

  x = ±√(81 -y^2)

Step-by-step explanation:

Subtract y^2 and take the square root.

  x^2 +y^2 -y^2 = 81 -y^2 . . . . . subtract y^2

  x^2 = 81 -y^2 . . . . . simplify

  x = ±√(81 -y^2) . . . . take the square root

You might be interested in
Could anyone find this?
lina2011 [118]

Answer:

Step-by-step explanation:

Since the squares have areas of 32u^2. The side lengths are

s=\sqrt{32}\\ \\ \text{By the Pythagorean Theorem}\\ \\ x^2=s^2+s^2\\ \\ x^2=32+32\\ \\ x^2=64\\ \\ x=\sqrt{64}\\ \\ x=8

8 0
3 years ago
Please help and thank you
galina1969 [7]

Answer:I am not sure sorry

Step-by-step explanation:

7 0
3 years ago
Type the correct answer in each box. Use numerals instead of words.
Alex_Xolod [135]

Answer:


Step-by-step explanation:

Given that prices for a pair of shoes lie in the interval

[80,180] dollars.

Delivery fee 20% of price.  

i.e. delivery fee will be in the interval [4, 9]

(1/20th of price)

Total cost= price of shoedelivery cost

Hence f(c) = c+c/20 = 21c/20

The domain of this function would be c lying between 80 to 180

So domain =[80,180]

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

Amount to be repaid = 42 dollars

Once he received this amount, the price would be

105+42 =147

But since price range is only [21*80/20, 21*180/20]

=[84, 189]

Since now Albert has 147 dollars, he can afford is

[80,147]




6 0
4 years ago
Read 2 more answers
Select all that apply.
fomenos
First, third, fifth, and sixth answer
5 0
3 years ago
Read 2 more answers
Find the value of x. Round to the nearest degree.
Fantom [35]

Answer:

x = 51

Step-by-step explanation:

Here, we want to find the value of x

To do this, we are going to use the appropriate trigonometric identity

We have the side facing the right angle ( hypotenuse) and the side facing the angle given (opposite)

The trigonometric identity that links both is the sine and it is the ratio of the opposite to the hypotenuse

Thus, we have it that;

sine x = 7/9

x = arisine (7/9)

x = 51

4 0
3 years ago
Other questions:
  • 1. Multiply. x X x³.
    12·1 answer
  • I need help NOW!!!!!! Thanks!
    10·2 answers
  • There are 3 red, 1 blue and 2 yellow marbles in a bag. Once a marble is selected it is replaced. Find P(3 red marbles)
    13·1 answer
  • Packages of mixed-colored socks contain 8 pairs of socks. In each package, there are 5 pairs of White socks. How many pairs of w
    13·1 answer
  • What is the equation of a line that passes through (-2,1) and is parallel to y=3x-4
    9·1 answer
  • 2. Graph y=|x|-2 (1 point)
    7·1 answer
  • An inlet pipe can fill a water tank in 12 hours. An outlet pipe can drain
    11·1 answer
  • Write an equation of the line that passes through (4, −6) and is parallel to the line y=−3x−9.
    12·1 answer
  • Polygon ABCD has vertices A(1,3), B(1,6), C(4,6), and D(5,2)
    8·1 answer
  • Multiply 5.4x and 2x.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!