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3 years ago

Compute: 11:30 - 4:45 =

Mathematics

2 answers:

adoni [48]3 years ago

8 0

Answer:

6:45

Step-by-step explanation:

NISA [10]3 years ago

5 0

The answer is 6:45. 11:30-4:45 = 6:45

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Does the graph represent a function? Khan Academy

Ierofanga [76]

Answer:

yes

Step-by-step explanation:

try using a vertical line, if you move the vertical line across the graph and the line touches the graph only at one point, than it means it is a function

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2 years ago

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to arrive at 2000 liters of 60% saline solution the attendant has to mix a 90% and a 40% saline solution. How many liters of eac

CaHeK987 [17]

Answer:

800 liters of 90% saline solution and 1200 liters of 40% saline solution should be used.

Step-by-step explanation:

Given:

At 2000 liters of 60% saline solution the attendant has to mix a 90% and a 40% saline solution.

Now, to find the number of liters of saline solution each should be used.

Let the liters of 90% saline solution mix be $x.$

And let the liters of 40% saline solution mix be $y.$

So, the total number of liters:

$x+y=2000.$

$y=2000-x\ \ \ ....(1)$

Now, the total percentage of saline solution:

$90\%\ of\ x+40\%\ of\ y=60\%\ of\ 2000$

$\frac{90}{100}\times x+\frac{40}{100}\times y=\frac{60}{100}\times 2000$

$0.9x+0.4y=1200$

Substituting the value of $y$ from equation (1) we get:

$0.9x+0.4(2000-x)=1200$

$0.9x+800-0.4x=1200$

$0.5x+800=1200$

Subtracting both sides by 800 we get:

$0.5x=400$

Dividing both sides by 0.5 we get:

$x=800.$

The liters of 90% saline solution mix = 800.

Now, substituting the value of $x$ in equation (1) to get the liters of 40% saline solution:

$y=2000-x$

$y=2000-800$

$y=1200.$

Thus, the liters of 40% saline solution = 1200.

Therefore, 800 liters of 90% saline solution and 1200 liters of 40% saline solution should be used.

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3 years ago

Help i dont know what to do

Rashid [163]

Answer:

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2 years ago

the ratio of girls to boys in an astronomy club was 3:2. there were 30 girls. how many total members were there in the club

lakkis [162]

Answer:

Explanation: the ratio 2:4 can be reduced to 1:2, where the number of girls corresponds to the 1 and the number of boys corresponds to the 2. If there are 14 girls, then there must be 28 boys (14 x 2 = 28). Now to get the total number we need to add the total number of boys and girls together. So 14 + 28 = 42

Step-by-step explanation:

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3 years ago

What is the solution to w-11=1.3

trapecia [35]

Simplifying w + -11 = 1.3

Reorder the terms: -11 + w = 1.3

Solving -11 + w = 1.3

Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + w = 1.3 + 11

Combine like terms: -11 + 11 = 0 0 + w = 1.3 + 11 w = 1.3 + 11

Combine like terms: 1.3 + 11 = 12.3 w = 12.3

Simplifying w = 12.3 <--- (Answer)

Happy studying ^-^

7 0

3 years ago

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