2 years ago

–5y – 10 – 10y + –4y

Mathematics

1 answer:

EastWind [94]2 years ago

5 0

Answer:

- 19y -10

Step-by-step explanation:

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Beaker A contains 1 liter which is 30 percent oil and the rest is vinegar, thoroughly mixed up. Beaker B contains 2 liters which

alekssr [168]

Answer:

1.25 liters of oil

Step-by-step explanation:

Volume in Beaker A = 1 L

Volume of Oil in Beaker A = 1*0.3 = 0.3 L

Volume of Vinegar in Beaker A = 1*0.7 = 0.7 L

Volume in Beaker B = 2 L

Volume of Oil in Beaker B = 2*0.4 = 0.8 L

Volume of Vinegar in Beaker B = 1*0.6 = 1.2 L

If half of the contents of B are poured into A and assuming a homogeneous mixture, the new volumes of oil (Voa) and vinegar (Vva) in beaker A are:

$V_{oa} = 0.3+\frac{0.8}{2} \\V_{oa} = 0.7 \\V_{va} = 0.7+\frac{1.2}{2} \\V_{va} = 1.3$

The amount of oil needed to be added to beaker A in order to produce a mixture which is 60 percent oil (Vomix) is given by:

$0.6*V_{total} = V_{oa} +V_{omix}\\0.6*(V_{va}+V_{oa} +V_{omix}) = V_{oa} +V_{omix}\\0.6*(1.3+0.7+V_{omix})=0.7+V_{omix}\\V_{omix}=\frac{0.5}{0.4} \\V_{omix}=1.25 \ L$

1.25 liters of oil are needed.

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3 years ago

Terri wants to put a fence around her tomato plants to keep the rabbits out. The hardware store only sells fencing in five-foot

Mice21 [21]

Answer: 30 increments

Step-by-step explanation: 150 divided by 5 is equal to 30. If she is buying in 5 foot increments she will need 30 five foot increments to have enough.

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3 years ago

A) vẽ đồ thị hàm số y=2x-3(d1)

IgorC [24]

Answer:

Step-by-step explanation:

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3 years ago

Solve the quadratic by quadratic formula<br><br> 7x-10=x squared

alexgriva [62]

0= x^2-7x+10

Factor
(x-5)(x-2)=0

Check
-5-2=-7, -5*-2=10

Use ZPP
x-5=0
x=5

x-2=0
x=2

Final answer: x=2, x=5

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3 years ago

The measures of the angles in an equilateral triangle are equal.

max2010maxim [7]

Answer:

C. 60°

Step-by-step explanation:

because all angles in a triangle sum up to 180°

60°+60°+60°=180°

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3 years ago