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vredina [299]
3 years ago
9

if store uses a selling price --- based markup of 40% and an item costs the store $300 what selling price would the store set fo

r the item ?
Mathematics
1 answer:
Nina [5.8K]3 years ago
6 0
The price would be $120
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Help me with this math question please I'm giving away brainliests ​
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Factor completely 81x2 − 100. (1 point) (10x − 9)(10x − 9) (10x − 9)(10x + 9) (9x − 10)(9x + 10) (9x − 10)(9x − 10)
MArishka [77]

The complete factorization of the equation 81x² - 100 is; (9x - 10)(9x + 10)

<h3>How to factorize quadratic equations?</h3>

We are given the quadratic equation;

81x² - 100

Now, according to quadratic identities, we know that;

(a + b) * (a - b) = a² - b²

Now, our equation can also be expressed as;

81x² - 100 = 9²x² - 10²

Thus, applying the quadratic identity gives us;

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Read more about factorization of quadratic equations at; brainly.com/question/1214333

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A plane is descending towards a runway in Chicago. The plane is flying at an altitude of 11 miles and is 193 miles from the runw
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The plane will make an angle 3.26^{\circ} with the runway.

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Given that the plane is flying at an altitude of 11 miles and is 193 miles from the runway, as measured from the ground.

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From the given measurements, we can see that it is a right angled triangle. Hence, let us use the tangent formula to determine the angle.

The formula for the tangent is given by

tan \ \theta=\frac{opp}{adj}

Where opp=11 and adj=193

Substituting these values in the above equation, we get,

tan \ \theta=\frac{11}{193}

Dividing, we get,

tan \ \theta=0.057

Taking tan^{-1} on both sides of the equation, we get,

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