The formula is
time = (Worker 1 * Worker 2) / (Worker 1 + Worker 2)
time = (18 * 20) / (18 + 20)
time = 360 / 38
time =
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<span>
9.4736842105
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minutes
So, the answer is "a. 9.5 minutes".
Source
http://www.1728.org/work.htm
<span>Step 1: Simplify both sides of the equation.
</span>1/2 (6−z) = <span>z
</span><span>
(1/2) (6) + (1/2) (-z) = z (distribute)
3 + -1/2z = z
-1/2z + 3 = z
</span><span>Step 2: Subtract z from both sides.
</span><span>
-1/2z + 3 - z = z - z
-3/2z + 3 = 0
</span><span>Step 3: Subtract 3 from both sides.
</span><span>
-3/2z + 3 - 3 = 0 - 3
-3/2z = -3
</span><span>Step 4: Multiply both sides by 2/(-3).
</span><span>
(2/-3) * (-3/2z) = (2/-3) * (-3)
z = 2
Answer: z = 2
I hope this helps you!:) Sorry it took me so long!
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Answer:
C
Step-by-step explanation:
Use the sine ratio in the left, right triangle to find the common side to both triangles and the exact values
sin60° = , cos45° = , thus
sin60° = = = ( cross- multiply )
2 × opp = 21 ( divide both sides by 2 )
opp =
Now consider the right triangle on the right, using the cosine ratio
cos45° = = = ( cross- multiply )
x = × = → C
Answer:
30.4m
Step-by-step explanation:
Diameter(D) = 2r (radius)
D = 9.7m
r = 9.7m / 2
= 4.85m
C = 2πr
= 2π × 4.85m
= 30.47344873982099m
rounding - Leave it as is if the digit in the tenth is 4 or lower
- round it up if it's 5 or higher.
~~ 30.4m