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sineoko [7]
3 years ago
13

A mixture of 2 chemicals measures 1,034 milliliters. it contains some of chemical A and 755 milliliters of chemical B. how much

less of chemical A than Beach is in the mixture?
Mathematics
1 answer:
Stella [2.4K]3 years ago
4 0
-476
1034 - 755 = 279
279 - 755 = -476
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You volunteer to help drive people home from an event. There are 18 people who need rides, but you can only fit 7 of them in you
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18 choose 7 
=C(18,7)
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OR
18 choices for first passenger,
17 choices for second passenger,
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12 choices for 7th passenger,
so total = 18*17*16...12
but there are 7! ways to order the 7 passengers, so
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=31824   as well
5 0
3 years ago
I need help with my algebra 2. I also want to know how to solve this.
Lisa [10]

Add 1 to both sides:

\sqrt{x+3} = x+1

In cases like this, we have to remember that a root is always positive, so we can square both sides only assuming that

x+1 \geq 0 \iff x \geq -1

Under this assumption, we square both sides and we have

x+3 = (x+1)^2 \iff x+3 = x^2+2x+1 \iff x^2+x-2 = 0

The solutions to this equation are

x = -2,\ x=1

But since we can only accept solutions greater than -1, we discard x=-2 and accept x=1.

In fact, we have

x=-2 \implies \sqrt{-2+3}-1=0\neq -2

and

x=1 \implies \sqrt{4}-1=1

which is the only solution.

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3 years ago
I need help on .5 and .6
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5. 44 (forty four)
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Write the equation of the line that passes through the points ( – 3, 2) and ( - 1,6).
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Answer:

the answer is y=2x+8

Step-by-step explanation:

6 0
3 years ago
More people leave Anytown, AL each year than move into it. The population over the past 20 years is shown in the table. Use tech
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The equation that models the exponential decline is y = 46348587109809610(0.9861)ˣ if the population over the past 20 years is provided.

<h3>What is the line of best fit?</h3>

A mathematical notion called the line of the best fit connects points spread throughout a graph. It's a type of linear regression that uses scatter data to figure out the best way to define the dots' relationship.

Let's suppose the equation that models the exponential decline is:

\rm y = a(b^x)

From the data given, we can calculate the value of a and b:

a = 46348587109809610

b = 0.9861

y = 46348587109809610(0.9861)ˣ

Thus, the equation that models the exponential decline is y = 46348587109809610(0.9861)ˣ if the population over the past 20 years is provided.

Learn more about the line of best fit here:

brainly.com/question/14279419

#SPJ1

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