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
Anika [276]
3 years ago
8

Which point is on the circle centered at the origin with a radius of 5 units?

Mathematics
2 answers:
egoroff_w [7]3 years ago
5 0

Answer:2, square root of 21 just took the test!

Step-by-step explanation:

Aleonysh [2.5K]3 years ago
3 0

Answer:

(2,√21)

Step-by-step explanation:

The circle centered at the origin has equation:

{x}^{2}  +  {y}^{2}  = 25

Any point that satisfies this equation lie on this circle.

When x=2, we substitute and solve for y.

{2}^{2}  +  {y}^{2}  = 25 \\ 4 +  {y}^{2}  = 25 \\  {y}^{2}  = 25 - 4 \\ {y}^{2}  = 21

Take square root to get:

y =  \pm \sqrt{21}

Therefore (2,-√21) and (2,√21) are on this circle.

From the options, (2,√21) is the correct answer

You might be interested in
Which of the following ordered pairs is the solution to the system of linear equations?
Mars2501 [29]
Solve for the first variable in one the equations then substitute the result into the other equation so the answer is (2,5)
3 0
3 years ago
Have I been solving these equations correctly?
Tresset [83]

14)


2(-3)² => 2(-3)(-3) => 2*9 = > 18


27+18-11 => 27 + 7 = > 34.


16)


\bf p(x)=\cfrac{x^2-4}{2x+1}\implies p(-8)=\cfrac{(-8)^2-4}{2(-8)+1}\implies p(-8)=\cfrac{64-4}{-16+1} \\\\\\ p(-8)=\cfrac{60}{-15}\implies p(-8)=-4


17)


\bf h(x)=3\cdot 9^x\implies h(-2)=3\cdot 9^{-2}\implies h(-2)=3\cdot \cfrac{1}{9^2} \\\\\\ h(-2)=\cfrac{3}{9^2}\implies h(-2)=\cfrac{3}{81}\implies h(-2)=\cfrac{1}{27}

4 0
3 years ago
Find the value of:<br> a) 5x when x = 6<br><br> B) 3y when y = -7
Y_Kistochka [10]

Answer:

a 30 b -21

Step-by-step explanation:

a 5x = 5(6)

= 30

b 3y = 3(-7)

= -21

7 0
3 years ago
Read 2 more answers
32 ÷ 4 x (16 x 1/2) -2
Anika [276]

32 ÷ 4 x (16 x 1/2) -2

= 32 ÷ 4 × 8 -2

= 8 × 8 - 2 = 64-2

= 62

3 0
2 years ago
Read 2 more answers
Thomas decides on a destination for his vacation. If he takes the train there, it will take 5 1/8 hours to get there. If he take
Allisa [31]

Answer: 2 11/24

Step-by-step explanation:

How many hours does the plane save?

Time taken for the train = 5 1/8

Time taken for the plane = 2 2/3

The number of hours saved will then be:

= 5 1/8 - 2 2/3

Let the lowest common multiple be 24

= 5 3/24 - 2 16/24

= 2 11/24

The number of hours saved by the plane will be 2 11/24

8 0
3 years ago
Other questions:
  • Explain how you would write 7/8 as a rate per 100.
    15·2 answers
  • we would multiply the divisor and dividend of 1.44 / 1.2 by what number to make the divisor a whole number
    11·1 answer
  • Huy rotated the figure 90 degrees counterclockwise about the origin. What are the new coordinates of point C?
    15·1 answer
  • Each month Adam changes the amount of food and sunlight a potted plant receives. When he started the plant was 63 cm tall. In th
    11·2 answers
  • Consider the number 4n , where n is a natural number. Check whether there is any value of e N for which 4n ends with the digit z
    5·1 answer
  • TV contains the points T(-5,13) and V(7,29). find the slope of TV.
    8·1 answer
  • 160% of 1825 rounded to nearest tenth
    7·2 answers
  • I need help ASAP !!!!!!
    10·1 answer
  • Can I get help on this please
    11·2 answers
  • Mr. Johnson sells erasers for $3 each. He sold 96 last week and he sold 204 this week. About how much more money did he make thi
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!