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irga5000 [103]
3 years ago
5

Don't know how to solve this? Please show work, thank you

Mathematics
1 answer:
sashaice [31]3 years ago
5 0
Can’t see the picture
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how many gallons of a 50 antifreeze solution must be mixed with 90 gallons of 20% antifreeze to get a mixture that is 40% antifr
Tamiku [17]
Try this:
1) note that weight of pure antifreeze before mixing and after mixing is the same. So, if 'x' is weight of pure antifreeze in 50% solution, it is possible to make up equation before mixing: 0.5x+0.2*90.
2) there are 0.2*90=18 gal. of pure antifreeze in the 20% solution. If 'x' gal. is the weight of pure antifreeze in 50% sol. and 18 gal. is the weight of pure antifreeze in 20% sol., it is possible to make up an equation after mixing: 0.4(x+18).
3) using the both parts: 0.5x+0.2*90=0.4(x+18) ⇒ x=54 gal. of <u>pure</u> weight.
4) to find 50% solution of 54 gal. pure weight just 54:0.5=108 gal.
Answer: 108 gal.
3 0
3 years ago
2/3 plus negative 1/3
vovikov84 [41]

2/3 + (-1/3) = 2/3 - 1/3 = 1/3

3 0
3 years ago
Can someone give me the correct answer for this.
Minchanka [31]

Answer:

The correct answer is option C that is graph X.

Step-by-step explanation:

Given : 1 sack lunch has 3 sandwiches

x axis = Number of sack lunches

y axis = Number of sandwiches

The coordinate from the given data will be: (1,3)

So, from the given graphs the graph with coordinate point (1,3) is correct. It will also show change in number of sandwiches with respect to change in number of sack lunches.

7 0
3 years ago
How to find the median on a dot plot?
pickupchik [31]

Answer:

In order to find the median of the data you take every value and order it from least to greatest. When you do this make sure you write a number the correct amount of times. for example if there are 4 dots above 6 on the dot plot then you need to make sure you write 6 4 times. After you have all the data from least to greatest find the number in the middle. that is the median.


4 0
3 years ago
Find the slope in the equation: y = 7x - 10 <br> 10<br> 7x<br> -10<br> 7
iogann1982 [59]

Answer:

7

Step-by-step explanation:

Remember this equation: y=mx+b where m=slope and b=y-intercept.

Therefore, the slope in the equation is 7.

4 0
3 years ago
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