Answer:
comic books = 2
magazines = 15
Step-by-step explanation:
Let c = number of comic books bought
Let m = number of magazines bought
He bought 17 items, so
c + m = 17
Comic books cost $4 each and magazines cost $3 each.
He spent $53 on comic books and magazines, so
4c + 3m = 53
Rearrange c + m = 17 to make m the subject:
m = 17 - c
Substitute m = 17 - c into 4c + 3m = 53 and solve for c:
4c + 3(17 - c) = 53
⇒ 4c + 51 - 3c = 53
⇒ c = 2
Substitute c = 2 into m = 17 - c to and solve for m:
m = 17 - 2 = 15
The inverse would be f-1(x)=x/3
The radius of the given sphere will be 9/π.
<h3>
What is a sphere?</h3>
- A sphere is a geometrical object that resembles a two-dimensional circle in three dimensions.
- In three-dimensional space, a sphere is a collection of points that are all located at the same r-distance from a single point.
- The radius of the sphere is denoted by the letter r, and the given point is its center.
- The sphere is a three-dimensional shape that is sometimes referred to as a circle's second cousin.
- A sphere is a solid shape that is round, without edges.
- Balloons, playing balls, and even light bulbs are examples of objects with sphere shapes.
So, the formula for the volume of a sphere: V = 4/3πr³
Volume is 972, then the radius will be:
- 972 = 4/3πr³
- 3(972) = 4πr³
- 2,916 = 4πr³
- πr³ = 2916/4
- πr³ = 729
- r³ = 729/π
- r = ∛729/π
- r = 9/π
Therefore, the radius of the given sphere will be 9/π.
Know more about spheres here:
brainly.com/question/22807400
#SPJ9
Answer:
The answer would be 15
Step-by-step explanation:
2/3 of 20 is 15
