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marin [14]
2 years ago
12

You need a 60% alcohol solution. On hand, you have a 480 mL of a 75% alcohol mixture. How much pure water will you need to add t

o obtain the desired solution?​
Mathematics
1 answer:
svetlana [45]2 years ago
5 0

Answer:

120 mL

Step-by-step explanation:

If the 480 mL has 75% concentration, then 360 mL are alcohol. To turn the 360 into only 60%, you need to increase the amount of water.

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-18+-6 please help
Verdich [7]

Answer:

-24

Step-by-step explanation:

If you are struggling with this here's a tip!

-18+-6 is what you are trying to solve

The 6 is negative, so get rid of the plus sign -18-6

2 negative numbers are just added like positive numbers

So add 18 and 6, you should get 24

Don't forget about the negative!

-24

6 0
2 years ago
Question 1 of 17
gizmo_the_mogwai [7]

Answer:

c

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
What are the zeros of the function f(x)=x^2-2x-15?
valkas [14]
To find the zeros of this function, we must first set the entire function equal to 0

f(x) = x² - 2x - 15 = 0

Since this is a quadratic function, we must use the quadratic formula, which is:

\frac{-b +/-  \sqrt{b^{2} - 4(a)(c) } }{2a}

Let's assign a, b, and c using our first function
x² means a = 1 (because it could be written as 1x²)
-2x means b = -2
-15 means c = -15

Now let's plug those in:

\frac{-(-2) +/- \sqrt{(-2)^{2} - 4(1)(-15) } }{2(1)}

which simplifies to:

\frac{2 +/- \sqrt{(4 + 60} }{2}

Simplified further:

\frac{2 +/- \sqrt{(64} }{2}
\frac{2 +/- 8 }{2}
And divide it by the 2 on the bottom gives us:

2 +/- 4

2+4 = 6
2-4 = -2

So the zeros of this function are -2 and 6
6 0
3 years ago
Read 2 more answers
Help asap pleasee, I'LL GIVE BRAINLIEST FOR THIS QUESTION
pochemuha

Answer:

C is the answer

Step-by-step explanation:

2π/2 = π

8 0
2 years ago
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If the side of square is 1/5 inches. Then what is the area of the square?​
DerKrebs [107]

Answer:

1/25

Step-by-step explanation:

1/5*1/5=1/25

because lenght times width equals area

3 0
3 years ago
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