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Leokris [45]
2 years ago
5

Which rate can you set StartFraction 30 miles Over 1 hour EndFraction equal to in order to find the time it takes to travel 900

miles at 30 miles per hour? StartFraction question mark hours Over 900 miles EndFraction StartFraction question mark hours Over 30 miles EndFraction StartFraction 30 miles Over question mark hours EndFraction StartFraction 900 miles Over question mark hours EndFraction
Mathematics
2 answers:
Marianna [84]2 years ago
6 0

Answer:

B!!!!

Step-by-step explanation:

SVETLANKA909090 [29]2 years ago
4 0

Answer:

 D. (900 mi)/(? hours)

Step-by-step explanation:

The given fraction has miles in the numerator and hours in the denominator. To write a proportion, you need to equate that to a fraction that has miles in the numerator and hours in the denominator. The (miles, hours) pair of interest is (900 miles, ? hours), so the necessary proportion is...

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Karissa rides her bicycle for 4 hours and is 22 miles from her house. After riding for 8 hours, she is
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5.5

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Nataly_w [17]
48 yards is the answer
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A football player punts a ball. The path of the ball can be modeled by the equation y = –0.004x2 + x + 2.5, where x is the horiz
Galina-37 [17]
The answer is <span>252.5 ft

</span><span>y = –0.004x</span>²<span> + x + 2.5
Let's take y = 0 and we'll get the quadratic equation:

</span>–0.004x² + x + 2.5 = 0
The general formula for quadratic equation is:
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a = -0.004
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x_{1,2} = \frac{-b+/- \sqrt{ b^{2}-4ac} }{2a} =\frac{-1+/- \sqrt{ 1^{2}-4*(-0.004)*2.5} }{2*(-0.004)} = \frac{-1+/- \sqrt{1+0.04} }{-0.008} = \\ &#10;=\frac{-1+/- \sqrt{1.04} }{-0.008} = \frac{-1+/-1.02}{-0.008}

x_1=\frac{-1+1.02}{-0.008} = \frac{0.02}{-0.008} = -2.5 \\ &#10;x_2=\frac{-1-1.02}{-0.008} = \frac{2.02}{-0.008} = 252.5

Since distance cannot be negative (x1), the correct answer is x2 = 252.5 ft
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3 years ago
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