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Semenov [28]
3 years ago
10

How do I reduce proportions?

Mathematics
1 answer:
Y_Kistochka [10]3 years ago
7 0

Answer:

Oh easy...

Step-by-step explanation:

Multiply the numerator on the left by the denominator on the right, and the numerator on the right by the denominator on the left, to solve a proportion. Cross multiplying is the term for this. Simplify the equation, then solve for the variable using the inverse operation, division.

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What is the length of a kite string that is 6 meters above and 9 meters away from where it is being held? Round to the nearest t
ivann1987 [24]

Answer:

10.8 meters

Step-by-step explanation:

This situation forms a right triangle, where the length of the kite string is the hypotenuse, the distance from where it is held is the long leg, and the height is the short leg.

Use the pythagorean theorem to solve for c, the length of the kite string.

a² + b² = c²

6² + 9² = c²

36 + 81 = c²

117 = c²

10.8 = c

So, the length of the kite string is 10.8 meters

7 0
3 years ago
A research organization wanted to estimate the average number of hours a college student sleeps per night during the school year
Alekssandra [29.7K]

Answer:

Step-by-step explanation:

Given given that

  • Lower confidence interval = 7.1
  • Upper confidence interval = 7.5
  • As such, We are 95% confident that it's somewhere between 7.1 and 7.5 hours per night

Average value = LCI + UCI /2 = 7.1 + 7.5 / 2

= 7.3hours per night, so we are 95% confident that it's somewhere between 7.1 and 7.5 hours per night which is eventually 7.3hrs per night.

4 0
4 years ago
The ant hill is 19.5 cm tall. If 1 cm equals 10mm, how many mm tall is the ant hill?
White raven [17]

Answer:  195 mm

Step-by-step explanation: You multiply 19.5 by 10 because you need to find out how many milimeters are in 19.5 cm,

7 0
3 years ago
I am 1,000,000 percent bamboozled. Can you help me out?​
DochEvi [55]
The answer is c because in 40 minutes (2/3 of an hour) they’ve completed 1/2 of the fence!
6 0
3 years ago
Which of the following is NOT a method to solve a quadratic equation?
fredd [130]

Answer: C. rationalizing the denominator

Rationalizing the denominator is a useful step to simplify expressions where there are square roots in the denominator. It doesn't apply to actually solving a quadratic. On the other hand, the quadratic formula can solve quadratics. The same applies for choices B and D as well.

5 0
2 years ago
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