What is the radius of the circle whose equation is x2 + y2 = 9?
3
9
81

 The radius of the circle is (A) 3 units.

Step-by-step explanation:  The given equation of the circle is

We are to find the radius of the circle represented by the equation (i).

The standard form of a circle with center (g, h) and radius 'r' units is given by

From equation (i), we have

This represents a circle with centre at the origin (0, 0) and radius 3 units.

Therefore, the radius of the given circle is 3 units.

Thus, (A) is the correct option.

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt