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Natalka [10]
3 years ago
12

Pablo drove 23.1 miles to his aunt’s house, then drove 19.24 miles to his friend’s house. Which estimate can Pablo use to determ

ine the distance he drove altogether?
Mathematics
2 answers:
Tems11 [23]3 years ago
8 0

Answer:

if you round all the numbers together youll get 23 and 19 because 1 is lower than 5 and the 2 in 19.24 is lower than 5 so itll be c 23+19=42.

katovenus [111]3 years ago
7 0

23.1 can be estimated to 23 rounded to 20.

19.24 can be estimated to 19  rounded to 20.

The answer would be 42 which would be rounded to 40.

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Theresa Morgan a chemist has a 10% hydrochloric acid solution and a 65% hydrochloric acid solution. How many liters of each shou
prisoha [69]

<u>ANSWER: </u>

170 liters of 10% hydrochloric acid must be mixed with 1700 liters of 65% hydrochloric acid solution to obtain 1870 liters of 60% solution.

<u>SOLUTION: </u>

First, set up a table. Fill in the unknowns with variables x and y. The table is attached below

From this, we can easily set up the two equations.  

Sum of values of two acids = Value of mixture  

0.1x + 0.65y = 1122  

For convenience, we'll multiply the entire equation by 100,

10x + 65y = 112200   ------ (1)  

Now, Sum of amounts of each acid = Amount of mixture  

x + y = 1870  ---------(2)

multiply (2) with 10 for easy calculation and derive the equation into one variable.

10x + 10y = 18700  

Subtracting equation (2) from (1),  

( + ) 10x + 65y = 112200

( − ) 10x + 10y = 18700

we get the solution as,

0 + 55y = 93500

Thus, 55y = 93500

y = 1700

Substituting y = 1700 in (2),

x + 1700 = 1870  

x  = 1870 - 1700  

x  = 170  

So, we have x = 170 and y = 1700

We can conclude that 170 liters of 10% hydrochloric acid must be mixed with 1700 liters of 65% hydrochloric acid solution  to obtain 1870 liters of 60% solution.

4 0
3 years ago
What’s the slope for (3,8)and (5,0)
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Answer:

slope = -4

Step-by-step explanation:

(y - y1)/(x -x1)

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use slope formula: (y² - y¹) / (x² - x¹)

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3 years ago
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168 is the least common multiple of 6,7,and 8


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