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KonstantinChe [14]
3 years ago
7

Which method is most efficient method to use to solve 2x^2+5x-11=0

Mathematics
1 answer:
dangina [55]3 years ago
8 0
May be you can use the quadratic equation formular.
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A boat took 5 h to travel 60 km up a river, against the current. The return trip took 3 h. Find the speed of the boat in still w
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Answer:

Correct answer: V₁ boat = 16 km/h and V₂ current = 4 km/h

Step-by-step explanation:

If we take speed (velocity) of the boat as V₁ and speed of the current V₂

Let us form equations:

Traveling down the current  V₁ + V₂ = 60/3 = 20 km/h

Traveling against the current  V₁ - V₂ = 60/5 = 12 km/h

V₁ - V₂ = 12

V₁ + V₂ = 20

If we add up the left and right sides of the equations we get:

2 V₁ = 32  =>    V₁ = 32/2 = 16 km/h

from the second equation we get:

V₂ = 20 - V₁ = 20 - 16 = 4 km/h

V₂ = 4 km/h

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3 years ago
kfc has 11 more then twice as many customers as when they started selling food . kfc now has 73 customers . how may did they hav
matrenka [14]

Answer:

<h2>73 - 11 equals 62. <em><u>THE ANSWER IS 31.</u></em></h2><h2><em><u>PLEASE ADD AS BRAINEST.</u></em></h2>

Step-by-step explanation:

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The fourth grade class at hart school is having a Valentine’s Day party. Each student will receive an 8-oz.cup of juice. If ther
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6 bottles of juice

Step-by-step explanation:

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2. find the number of bottles needed (total amount of juice divided by amount in each bottle): 384/64 = 6

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