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2 years ago

65= t - 5 - 7 what is t

Mathematics

2 answers:

Nookie1986 [14]2 years ago

7 0

Answer: t = 77

Step-by-step explanation:

To solve for t, we will simplify and isolate the variable.

Given:

65 = t - 5 - 7

Combine like terms:

65 = t - 12

Add 12 to both sides of the equation:

77 = t

Inessa05 [86]2 years ago

4 0

Hey there!

65 = t - 5 - 7

t - 5 - 7 = 65

COMBINE the LIKE TERMS

t - (-5 - 7) = 65

t - 5 - 7 = 65

t - 12 = 65

ADD 12 to BOTH SIDES

t - 12 + 12 = 12 + 65

SIMPLIFY IT

t = 65 + 12

t = 77

Therefore, your answer should be:

t = 77

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

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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

ANSWERED

kvv77 [185]

Answer:

c but you have it so thanks

Step-by-step explanation:

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3 years ago

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xenn [34]

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Step-by-step explanation:

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