Answer:
r = 6.40 feet
Step-by-step explanation:
Given line AB is tangent to circle O at point A, this means ∡OAB = 90°
Hence this is a right angle triangle and we can use the Pythagorean theorem.
r² + 20² = 21²
r² = 21² - 20²
r² = 441 - 400
r² = 41
r = √41 = 6.40 feet
[19] x2 [38]x2[76]x2[152]x2[304] this is the answer
If u want to know how I get it than divide the number in the box by 2 than u will get the first two missing number than last u divide 152 by 2 to get the last missing number
Answer:
720
Step-by-step explanation:
6 x 120=720
Every 1 cm=120 km
So multiply both sides by 6 and you get
6 cm= 720 km
1. Let
x = first piece
y = second piece
z = third piece
2. Arrange it into an equation
x + y + z = 50
3. The second piece is 4 times as long as the first piece so 4x = y.
The third piece is 5 times as long as the first piece so 5x = z
4. Now substitute the values
x + (4x) + (5x) = 50
5. Simplifying makes the equation into 10x = 50
6. Do the opposite of multiplying to get rid of the 10 which is dividing. Divide 50 by 10.
x = 50/10
x = 5
7. Now substitute x in 4x and 5x
4 * 5 = 20
5 * 5 = 25
8.
x = 5
y = 20
z = 25