144 is 4/8 of what number

1 answer:

8 0

When looking for 4/8's of something it is much easier if you first simplify the fraction, so for 4/8 you would start by dividing both the denominator and the numerator by 4, 4/4= 1. 8/4= 2. Now you have changed the fraction to its simplest form, 1/2. So if 1/2 of something 144, you simply times 144 by 2 to get 288.

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A store sells Brazilian coffee for $10 per lb. and Columbian coffee for $14 per lb. If the store decides to make a 150-lb. blend

Artemon [7]

Answer:

The store should use 112.5 pounds of Brazilian coffee and 37.5 pounds of Colombian cofee.

Step-by-step explanation:

Let "b" be the amount of Brazilian coffee, in pounds, required for the blend and "c" the amount of Colombian coffee required, in pounds.

Since there are two unknown variables a two-equation system is needed to solve the problem, we can set up one equation for weight and another for price as follows:

$b+c=150\\10*b+14*c=11*150$

Solve for "c" by multiplying the first equation by -10 and adding it to the second one:

$b+c=150\\10b+14c -10b-10c=11*150 -(10*150)\\4c=150\\c = 37.5$

Now, solve for b by replacing the value obtained into the first equation

$b+c=150\\b= 150 - 37.5\\b=112.5$

The store should use 112.5 pounds of Brazilian coffee and 37.5 pounds of Colombian cofee.

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Answer:

133.33

Step-by-step explanation:

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At the moment a hot cake is put in a cooler, the difference between the cake's and the cooler's temperatures is 50° Celsius. Thi

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Answer:: D(t)= 50(4/5)^t

Step-by-step explanation: If 1/5 of the temperature difference is lost each minute, that means 4/5 of the difference remains each minute. So each minute, the temperature difference is multiplied by a factor of 4/5 (or 0.8).

If we start with the initial temperature difference, 50° Celsius, and keep multiplying by 4/5, this function gives us the temperature difference t minutes after the cake was put in the cooler.

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Answer:

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Step-by-step explanation:

We have to search the points that the line and the parabola have in common, that are the points where they intercept

(3,1) ; (6,-2)

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