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
sleet_krkn [62]
3 years ago
9

What is the radius of the circle whose equation is x2 + y2 = 8? 2 4 64

Mathematics
2 answers:
Naily [24]3 years ago
8 0

Answer:

The equation of circle of radius r whose centre is the origin (0, 0) ,

It is given by:    x^2+y^2 =r^2                    ......[1]

Given the equation: x^2+y^2 =8

To find the radius of the circle;

Compare the given equation with [1] we have;

r^2 = 8

Taking square root both sides we get;

r = \sqrt{8} = 2\sqrt{2} units

Therefore, the radius of the circle is, 2\sqrt{2} units

umka2103 [35]3 years ago
6 0
It would be
\sqrt{8}
Or
2\sqrt{2}
You might be interested in
Find the surface area
harkovskaia [24]
The answer is C 210 pi cm^3. Hope this helps

8 0
3 years ago
To study the effectiveness of vitamin C in preventing colds, a researcher recruited 200 volunteers. She randomly assigned 100 of
Paul [167]

Answer:

The claim made by the researcher lacks the validity on basis of reasons as indicated in the explanation.

Step-by-step explanation:

The claim made by the researcher is not valid on basis of following reasons:

  1. Interacting variables are not mapped accurately. The additional variables as the health status of the volunteers, eating and fitness habits are not considered in the consideration. This results in a in complete validation.
  2. The placebo effect is not catered accordingly. As the half of the volunteers are taking nothing, this is not the direct influence of the placebo and thus double-blinded testing for placebo effect is to be ensured in future experiments.
  3. The environmental effects are not considered as the effect under study is dependent on the environmental effects, thus the claim is biased and the generalization is not valid.
5 0
3 years ago
A set of equations is given below:
TEA [102]
The 3rd selection is appropriate.

.. 5b +1 = a = 3b +5
by the transitive property of equality,
.. 5b +1 = 3b +5
6 0
3 years ago
The length of a rectangle Is 3 Inches more than its width, and its perimeter is 22 Inches. Find the width of the rectangle.
Vesnalui [34]

Answer:

the width of the rectangle is 7 inches

Step-by-step explanation:

3 0
3 years ago
Write the slop intercept form of the equations below.
ohaa [14]
1 is y=1/4x+4
2 is y=x+1
4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the value of the expression 1/2 - ( - 1/3 + 2/5 ) ?
    6·1 answer
  • Jalen has a balance of $1870 on a credit card with an APR of 19.7%, compounded daily. About how much will he save in interest ov
    5·1 answer
  • Describe a method for writing an exponential equation given a graph
    14·1 answer
  • Plz help i know it is a lot, but could somebody, do al least a few?? plz (T-T)
    6·1 answer
  • Elijah estimates that 80% of the email he receives could be classified as junk. To predict how many junk mail messages he might
    10·2 answers
  • Assessment started: undefined.
    13·1 answer
  • A wheel has a radious of 50cm. How many times would the wheel go around if it rolled for 10km
    10·1 answer
  • What is the value of y in the system of equations 6x-y=2 and 4x-y=-8
    13·1 answer
  • Find the value of the variable.<br>Z=?
    13·1 answer
  • If the two acute angles of a right triangle are congruent, then what is the measure of each acute angle?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!