It takes them 1 7/8 hrs to complete the job together.
How:
Fred = 3 hrs
Jason = 5 hrs
1/3x + 1/5x = 1/x
3x x 5x = 15 —> 3x/15 + 5x/15 = 15/15
3x + 5x = 8x —> 8x/15 = 1.875 = 1 7/8 hrs
The answer is 28 (I took the quiz in k12) :)
System of Equations:
{-2x+2
{-1/3x-3
I used y=mx+b to find the equations
The radius of the hemisphere is 9.5 inches.
The diameter of the hemisphere is 19 inches.
The surface area of the hemisphere is 850.2 inches²
<h3>How to find the surface area of an hemisphere?</h3>
circumference of a circle = 2πr
where
Therefore,
19π = 2πr
2r = 19
r = 19 / 2
r = 9.5 inches
diameter = 9.5 × 2 = 19 inches
Therefore,
surface area of an hemisphere = 3πr²
surface area of an hemisphere = 3 × 3.14 × 9.5²
surface area of an hemisphere = 850.155 inches²
surface area of an hemisphere = 850.2 inches²
learn more on hemisphere here: brainly.com/question/14076143
#SPJ1
The answer would be 7 out of 20 or 7/20 because 6 pennies +3 dimes +4 quarters =13 coins so that leaves 7 nickels