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Mademuasel [1]
3 years ago
12

A chemist mixes 125 milliliters of a solution that is 18% acid with 500 milliliters of pure acid.

Mathematics
1 answer:
Scrat [10]3 years ago
3 0
How Manet millionaire of acid are
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A student solves a problem correctly 40 times out of 72 tries. Based on this data, what is the probability that the student inco
suter [353]

Answer:

The probability of the student incorrectly solves the next problem is 44%.

Step-by-step explanation:

Let E be the event of solving a problem correctly.

Then E' is the event that the problem is solved incorrectly.

Now, recall the definition of probability.

probability of an event = \frac{number of favorable events}{total number of events}

So,

p(E) = \frac{40}{72}

Also,

p(E) + p(E') = 1 and

p(E') = 1 - p(E)

= 1 - \frac{40}{72}

= \frac{72-40}{72}

= \frac{32}{72}

= \frac{4}{9}

= \frac{4}{9} (100)

= 44% rounded.

Hence, the probability of the student incorrectly solves the next problem is 44%.


4 0
3 years ago
Mariana solved a linear equation and found that it had an infinite number of solutions. Which could have been the final line of
Fofino [41]

Answer:

0=0

Step-by-step explanation:

Well, the linear equation can be expressed as y=ax+b in the solution of linear equations, there 3 main cases can be concluded as final lines. 1st case - the linear equation has no solution (for example, 0*x=5 has no solutions). 2nd case - the linear equation has one solution (for example 4*x=3 where the only one solution is x=0.75) and the 3rd case - the linear equation has infinite number of solutions (for example 0*x=0). So, in our case (3rd case) the last line can be concluded as 0=0.  

4 0
3 years ago
X + y = 4<br> 3x + 4y= 14
Vaselesa [24]
Y = 4 - x
3x + 4(4-x) = 14
3x + 16 -4x = 14
-x = -2
x = 2
y = 2
7 0
3 years ago
Read 2 more answers
Find the arc length of Arc AB.
LekaFEV [45]

Answer:

2.44pi

Step-by-step explanation:

it's in the picture

3 0
3 years ago
Can y'all help me do these I'm to lazy...
NISA [10]

I'll give you a hint

20) Add 56 to both sides

23) Add 1.5 to both sides


Also, as a AP Calc BC student, laziness doesn't really help get a good job soo...

8 0
3 years ago
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