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o-na [289]
4 years ago
7

Three friends went to the movies. They shared a popcorn and a pack of

Mathematics
1 answer:
faust18 [17]4 years ago
3 0

Answer:

Step-by-step explanation:

A) x+9 =45

x=45 - 9

x=36 cost the tickets

B) 36 :3=12 $cost a ticket

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2. The alkalinity of a fluid (pH) can be modeled in terms of its hydrogen ion concentration (H+, measured in moles/liter) of the
nataly862011 [7]

Given the equation:

pH=-log\mleft(H^+\mright)

You know that a lab technician finds that a sample of fluid has this pH:

pH=4.5

Then, in order to find the hydrogen ion concentration of the fluid, you need to follow these steps:

1. Substitute the pH given in the exercise into the equation:

4.5=-log(H^+)

Multiply both sides by -1:

-4.5=\log (H^+)

2. Solve for:

H^+

Remember that, by definition:

\log _b\mleft(c\mright)=a\Rightarrow b^a=c

In this case, you can identify that:

\begin{gathered} a=-4.5 \\ b=10 \\ c=H^+ \end{gathered}

Hence, substituting values and simplifying, you get:

\begin{gathered} b^a=c \\ 10^{-4.5}=H^+ \\ H^+=0.00003162278\text{ }\frac{moles}{liter} \end{gathered}

Therefore, the answer is:

H^+=0.00003162278\text{ }\frac{moles}{liter}

4 0
2 years ago
What’s the correct answer, please
Fofino [41]

Answer:

D?

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
How do you find the surface area for this one and what is the surface area for that?
klemol [59]
<span>First find the area of two sides (Length*Height)*2 sides, 60. Then find the area of adjacent sides (Width*Height)*2 sides, 43.2. And then find the area of ends (Length*Width)*2 ends, 72. Lastly add the three areas together to find the surface area, 175.2.</span>
6 0
3 years ago
Read 2 more answers
2 9/10 as a decimal number
ludmilkaskok [199]

2 9/10 in decimal form would be,

2.9

if you have any other questions like this,

let me know ill help you!!

8 0
3 years ago
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-4(3+7m) please help i will give brainlest and do not answer just to get points this is DUE IN FIVE MINUTES
lianna [129]

Answer:

-28m-12

Step-by-step explanation:hope that helps :)

=(−4)(3+7m)

=(−4)(3)+(−4)(7m)

=−12−28m

=−28m−12

6 0
3 years ago
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