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Galina-37 [17]
4 years ago
9

Mitchell is a big coffee fan, so he always takes care of coffee brewing at the office. Normally he uses 100 grams of Robusta cof

fee to prepare 10 cups of coffee. His friend brings him a packet of Arabica coffee and tells him that he should use 20 percent more than usual when brewing Arabica coffee. How many grams of coffee should he use to make a 15-cup pot of Arabica coffee?
Mathematics
1 answer:
babunello [35]4 years ago
6 0

Answer:

180

Step-by-step explanation:

So first find how much gram he used for each cup 100 divided by 10=10

so he needs to add 20 percent more, so 20% of 10 = 2

10+2=12

12*15 = 180

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Opposite of the hypotenuse

Step-by-step explanation:

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Answer:

Option C. -3x^2-13x-5

Step-by-step explanation:

we know that

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Find the area of a circle with radius 7cm
uysha [10]
<span>153.94 is the answer. </span>
4 0
3 years ago
Read 2 more answers
How much greater is the area of a square with a side length of 9 inches than the area of a circle with a radius of 3 inches?
fredd [130]
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The difference is 52.73 sq in; the square is larger, the circle smaller.
7 0
3 years ago
Let f be the function given by f(x)= (x-1)(x^2-4)/x^2-a. For what positive values of a is f continuous for all real numbers x?
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Answer:

a =1 and a=4.

Step-by-step explanation:

The function is

f(x)=\frac{(x-1)(x^2-4)}{x^2-a}

If we want f(x) to be continuous the denominator needs to be different to 0, otherwise f(x) will be indeterminate.

Now, for a a positive real we have that x=\sqrt{a} will annulate the denominator, i.e

(\sqrt{a})^2-a = a-a = 0. But, if a = 1 we have:

f(x)=\frac{(x-1)(x^2-4)}{x^2-1} = \frac{(x-1)(x^2-4)}{(x-1)(x+1)}=\frac{(x^2-4)}{x+1}

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Now, for a = 4 we have:

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so, the value x=\sqrt{a} = \sqrt{4} = 2 won't annulate the denominator.

In conclusion, for a=1 or a=1, the function will be continuos for all real numbers, since the denominator will never be 0.

4 0
3 years ago
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