2 years ago

five years ago, Alicia was twice as old as her brother Alex. if Alicia is 13 years old, how old is Alex ?

Mathematics

1 answer:

Elodia [21]2 years ago

5 0

Answer:

Step-by-step explanation:

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The perimeter of a shape is 25.71 cm calculate the value of the radius X takes pie to be 3.142

Mariulka [41]

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5 cm

Step-by-step explanation:

Given a semicircle with perimeter 25.71 cm, we are required to find the radius of the circle.

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$If \: \pi=3.142, C=25.71\\Then:\\25.71=3.142r+2r\\r(3.142+2)=25.71\\5.142r=25.71\\r=25.71 \div5.142\\r=5cm$

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2 years ago

Please help! Dont get it wrong pls

Vaselesa [24]

Answer:

5.4 > x > 2.8

Step-by-step explanation:

Sum of two sides is always greater than the third side

Case1 :

4.1 + 1.3 > x

5.4 > x

Case2:

4.1 + x > 1.3 or 1.3 + x > 4.1

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Note that it is obvious x is not -ve so neglect -2.8. x > 2.8

Hence,

5.4 > x > 2.8

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Step-by-step explanation:

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five years ago, Alicia was twice as old as her brother Alex. if Alicia is 13 years old, how old is Alex ? ​

five years ago, Alicia was twice as old as her brother Alex. if Alicia is 13 years old, how old is Alex ?