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Makovka662 [10]
2 years ago
7

Please help me with 8 im so very stuck i know how to do those but nothing will factor into eachother

Mathematics
1 answer:
Kisachek [45]2 years ago
7 0

Answer:

lol number 8 is x= i, -i , \frac{3}{4}, -4 so u are correct.

and number 7 is x=-\frac{1}{2} or \sqrt[5-i]\sqr\frac{23}{8}

Step-by-step explanation:

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A 25% acid solution must be added to a 40% solution to get 240 liters of 30% acid solution. How many of each should be used ?
schepotkina [342]

Answer:

The number of liters of 25% acid solution = x = 160 liters

The number of liters of 40% acid solution = y = 80 liters

Step-by-step explanation:

Let us represent:

The number of liters of 25% acid solution = x

The number of liters of 40% acid solution = y

Our system of Equations =

x + y = 240 liters....... Equation 1

x = 240 - y

A 25% acid solution must be added to a 40% solution to get 240 liters of 30% acid solution.

25% × x + 40% × y = 240 liters × 30%

0.25x+ 0.4y = 72...... Equation 2

We substitute 240 - y for x in Equation 2

0.25(240 - y)+ 0.4y = 72

60 - 0.25y + 0.4y = 72

Collect like terms

- 0.25y + 0.4y = 72 - 60

0.15y = 12

y = 12/0.15

y = 80 Liters

Solving for x

x = 240 - y

x = 240 liters - 80 Liters

x = 160 liters

Therefore,

The number of liters of 25% acid solution = x = 160 liters

The number of liters of 40% acid solution = y = 80 liters

5 0
2 years ago
A small jet can carry up to 44 passengers and 3 crew members. There is a weight restriction of 9200 pounds on board. The combine
Agata [3.3K]

Answer:

2.89 percent chance

Step-by-step explanation:

so first if you divide 9200 and 47 you get a total of 195.74 .now if you combine the weight of each passenger and crew memeber and their luggage it has a mean of 200.4 pounds with a standard deviation of 69.3 pounds  so their is a 2.89 percent chance im sure if not shoe me the nswers and i will give you th correct answer

7 0
3 years ago
Do you agree or disagree
lakkis [162]
Disagree she needs 7 cups of bananas because 1.75×4=7  
3 0
3 years ago
Read 2 more answers
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faltersainse [42]
Rooms are 3 dimentional
they have volume
area times height=volume

if dimentions are the same, that means that the legnth, width, height are same, so therefor they have same area (Judy is correct)

if area area same, then the height could be different, so Mrs. Ferguson is wrong





Judy is correct and Mrs. Ferguson is wrong


8 0
3 years ago
Solve for x <br> -4&lt;11-3x<br> ( the picture are the answer choices)
ryzh [129]
It is number 2 k mate
5 0
3 years ago
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