Answer:
Both the bottom and th one on top the bottem. Hoped i help:)
Step-by-step explanation:
Answer:
i wanna say its C,D,E,F but i get rational and irrational mixed u0
15 * 0 = -36 + a is your first expression
Solve the equation to find.
Add 36
(15 * 0) + 36 = a
0 + 36 = a
36 = a
Your second equation
24 * 8 * 0 = 36 - b
Add 36
(24 * 8 * 0) + 36 = b
36 = b
36 is the answer
let numerator be x and denominator be y
x = y-3...eqn 1
{(x +7)/ (y+5) } - x/y = 1/2... eqn 2
expandin eqn 2...
2y(x+7) - 2x(y+5) = y(y+5)
=》 2xy + 14y - 2xy -10x = y^2 + 5y
=》 14y - 10x = y^2 + 5y...eqn 3
subst x = y-3 in eqn 3
=》 y^2 + 5y - 14y + 10y -30 = 0
=》 y^2 + y - 30 = 0
solving the eqn
y = 5 thus x = 2
subst y = x+3 into eqn 2
2x +14 = x +8
x = -6
Answer:
- It would take them 4.8 minutes if they worked together.
Step-by-step explanation:
The rates of work are additive. That is, <em>the total rate when Anjali and Shayna work together is equal to the sum of the individual rates when they work separetely</em>.
1. <u>Rate of work of Anjali</u>:
- Eight minutes to wax a floor: r₁ = 1 floor / 8 minutes = 1/8
2. <u>Rate of work of Shayna</u>:
- Twelve minutes to was the same floor: r₂ = 1 floor / 12 minutes = 1/12
3. <u>Rate of work if they worked together</u>:
- r = r₁ + r₂ = 1/8 + 1/12
- steps to add the fractions:
- least common denominator: 2³ · 3 = 24
- r = 1/8 + 1/12 = 3/24 + 2/24 = 5/24 = 0.2083 ...
- that mean 5 floors/24 minute = 0.2083... floors/minute
4. <u>Time to wax a floor if they worked together</u>
- The time to wax one floor (minutes per floor) is the inverse of the rate, floors per minute:
- time = 1 / r = 24/5 = 4.8 minutes per floor.