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nordsb [41]
3 years ago
14

Someone pls help me!! thank you!!

Mathematics
1 answer:
romanna [79]3 years ago
6 0

Final Answer is 4.5

= 4.5hours more time was used on games than on research.

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A chemical company makes two brands of antifreeze. The first brand is 65% pure antifreeze, and the second brand is 90% pure anti
Murrr4er [49]

With amounts measured in gallons, let

x = amount of 65% antifreeze

y = amount of 90% antifreeze

1 gal of the 65% brand contains 0.65 gal of pure antifreeze; x gal would contain 0.65x gal. Similarly, y gal of the 90% brand contains 0.90y gal of pure antifreeze.

To obtain 120 gal of 80% antifreeze solution (which contains 0.80•120 = 96 gal of pure antifreeze), we must have

x + y = 120 … … … … … [total volume of antifreeze solution]

0.65x + 0.90y = 96 … [total volume of pure antifreeze]

Solve the first equation for y :

y = 120 - x

Substitute this into the second equation and solve for x :

0.65x + 0.90 (120 - x) = 96

0.65x + 108 - 0.90x = 96

0.25x = 12

x = 48

Solve for y :

y = 120 - 48

y = 72

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2 years ago
Solve for x 6-12x = -54
kvasek [131]

Answer:

The answer of the question is 5

8 0
3 years ago
Please help my assignment
m_a_m_a [10]
There is no solution since ln(0) is undefined
3 0
2 years ago
Use the chart to multiply the binomial by the trinomial.
sukhopar [10]
Answer:  " -2y³ + 3y²<span> + 27y " . 
_______________________________________________________
Refer to the completed chart below (image attached).</span>
_______________________________________________________
Using the completed chart below (image attached), we can write out the terms:
__________________________________________________
  y³ − 3y³ + 9y² + 3y² − 9y² + 27y ;

Then, we can combine the "like terms" ;
__________________________________________
y³ − 3y³  = -2y³ ;

+9y² + 3y² − 9y² =  + 3y² ;
___________________________________________________________
to get:  -2y³ + 3y² ;   and bring down the "+27y" ;
___________________________________________________________
    Answer:  " -2y³ + 3y²<span> + 27y " .   </span>Refer to chart below (image attached).
___________________________________________________________

5 0
4 years ago
Read 2 more answers
Please please please help!!!
jonny [76]

Answer:

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8 0
3 years ago
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