The surface of a sphere is given by the formula:
area=4πr²
Data:
r=30 m
area=4ππ(30 m)²=3600π m².
Answer: the area of this sphere is 3600π m².
Answer:
x= 20
Step-by-step explanation:
Considering this is a strait line, when you add both of these angles, you should get 180. To check my work:
(3x+8) plug in the 20 so it is 3(20)+8 = 68
(5x+12) plug in the 20 so it is 5(20)+12= 112
Then you simply add 68 and 112 which gets you 180. Meaning, x=20
Hope this helped :)
Answer:
Baseballs is: $10
Bats is: $4
Step-by-step explanation:
Let x represent bats
and y represent baseballs
So we have :
(1) 4x + 7y = 68
(2) x + y = 14 => y = 14 - x
Use substitution.
Substitute equation (2) into equation (1)
4x + 7(14 - x) = 68
Solve for x
4x + 98 -7x = 68
-3x + 98 = 68
-3x = -30
x = 10
Solve for y, replace x = 2 into equation (2)
y = 14 - 10 = 4, so y = 4
Since x represents bats and y represents baseballs, it cost $10 for the bats and $4 for the baseballs.