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AleksandrR [38]

3 years ago

13

Franklin jarred 4 liters of jam after 2 days. How many days does Franklin need to spend making jam if he wants to jar 20 liters

of jam in all? Solve using unit rates. days

1 answer:

belka [17]3 years ago

5 0

Answer:

10

Step-by-step explanation:

20/4=5*2=10

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4.8-46c+13x

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Marisa is measuring the distance d(t) that an ant marches in t minutes. Which of the following is the most appropriate domain fo

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4 years ago

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a boat is going 144 miles upstream on a river. the speed of the boat in still water is 60 miles per hour. the speed of the river

Katena32 [7]

Answer:

Let b = rate of the boat.

Let r = rate of the river.

The rate going downstream is b + r.

The rate going upstream is b - r.

rate x time = distance

4(b + r) = 144 ---> b + r = 36 [divide both sides by 4]

9(b - r) = 144 ---> b - r = 16 [divide both sides by 9]

Add town: 2b = 52

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r = 10 mi/hr

Step-by-step explanation:

5 0

3 years ago

What are the exact solutions of x2 − 5x − 1 = 0 using x equals negative b plus or minus the square root of the quantity b square

geniusboy [140]

Answer:

$x=2.5+\frac{\sqrt{29}}{2}\\\\x=2.5-\frac{\sqrt{29}}{2}$

Step-by-step explanation:

So the question here is asking you to use the quadratic formula which is expressed as: $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\$

A quadratic can generally be expressed as: $y=ax^2+bx+c$

So using the equation you gave: $0=x^2-5x-1$

We can identify the following values: a=1, b=-5, c=-1

Btw the equation explicitly write "1" as the coefficient of x, but since it's not provided it's implied that it's 1.

So plugging in the known values, we get the following equation:

$x=\frac{5\pm\sqrt{(-5)^2-4(1)(-1)}}{2(1)}\\\\x=\frac{5\pm\sqrt{25+4}}{2}\\\\x=\frac{5\pm\sqrt{29}}{2}\\\\x=2.5+\frac{\sqrt{29}}{2}\\\\x=2.5-\frac{\sqrt{29}}{2}$

The last step just consists of taking the + and - solution, and since it asks for exact solutions you leave the 29 under the radical, and you don't approximate. There is no further simplification that can be done here.

5 0

2 years ago