2 years ago

Solve by using the method of elimination(X and Y): 3x+4y=300

Mathematics

1 answer:

Ierofanga [76]2 years ago

6 0

Answer:

x=-4/3y+100

Y=-3/4x+75

Step-by-step explanation:

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Both A and B im pretty sure. they all have the same no matter

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1 year ago

What is 2.25 x 10 to the 4 power in standard form?

Elanso [62]

Answer:

Here's how to solve.

Step-by-step explanation:

10 to the 4th power= 10,000

So it would be 2.25*10,000

22,500 would be your answer.

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2 years ago

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Answer:

$\left(y-5\right)^2=-14\:\left(x-\frac{7}{2}\right)$

Step-by-step explanation:

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2 years ago

A patient is given a solution containing 0.625 g of calcium carbonate. If the calcium carbonate solution contains 1250 mg per 5

Dmitrij [34]

Answer: 2.5 mL

Step-by-step explanation:

Given : A patient is given a solution containing 0.625 g of calcium carbonate.

i.e. Patient required calcium carbonate = 625 mg [∵ 1 g = 1000 mg]

Let x be the amount of solution ( in millimeters) given to the patients.

Ratio of amount of calcium carbonate (mg) to amount of solution (ml) = $\dfrac{625}{x}$

If the calcium carbonate solution contains 1250 mg per 5 mL,

Then, Ratio of amount of calcium carbonate to amount of solution = $\dfrac{1250}{5}$

By using proportion we have :-

$\dfrac{625}{x}=\dfrac{1250}{5}\\\\\Rightarropw\ x=\dfrac{5\times625}{1250}=2.5$

Hence, 2.5 mL solution were given to the patient.

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2 years ago