Help please!!!!!!!!!!!!!!!!!!!

What is the equation of a circle centered at the origin with radius 20?

Colt1911 [192]

We know that
the equation of a circle is
(x-h)²+(y-k)²=r²
where
(h,k)-----> is the center
r--------> is the radius

is the center is the point (0,0) and radius r=20
then
(h,k) is (0,0)

(x-0)²+(y-0)²=20²---------> (x)²+(y)²=400

the answer is
the option D.) x2 + y2 = 400

3 0

3 years ago

30 POINTS PLEASE ANSWER THIS QUICKLY!!!

Nuetrik [128]

Answer:

It is unlikely to have thunderstorms tomorrow

Step-by-step explanation:

20% chance mean 20/100 = 0.2

The probability of having the even is 0.2

Remember of the probability of having an even is 0 -0.5 then the event is unlikely to happen

if the probability is 0.5 we have a 50% chance of the even happening

If the probability is 0.5 to 1 then the event is likely to happen

If the probability is 1, that event will happen

5 0

3 years ago

How old would you be today if you were born in 1977?

Montano1993 [528]

Current year is 2016
born year is 1977

old
2016 - 1977
39 years

5 0

4 years ago

Read 2 more answers

A delivery truck drives three routes in one day. The first route is 12 miles long, the second route is 10 miles

mina [271]

Answer: 38 11/12

Step-by-step explanation: Based on the given conditions, formulate:

Remove the parentheses:

Reorder and combine like terms:

Calculate the sum or difference:

Convert the expression into a fraction:

Expand the fraction to get the least common demominator:

Calculate the product or quotient:

Write the numerators over common denominator:

Calculate the sum or difference:

Convert to mixed fraction:

4 0

2 years ago

PLEASE ANSWER ASAP

vovikov84 [41]

Answer:

15 years

Step-by-step explanation:

subtract 30000 from 36000 to get 6000, then subtract 2000 from 2400, you get 400, then divide 6000 by 400

8 0

3 years ago