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EastWind [94]
1 year ago
13

Which is NOT always true?A rectangle is a parallelogramA square is a rhombusA rhombus is a rectangleA square is a rectangle

Mathematics
1 answer:
Lemur [1.5K]1 year ago
4 0

EXPLANATION

-A rectangle is a parallelogram. True. Every rectangle is a parallelogram.

-A square is a rhombus. True. Every square is a rhombus.

Every rhombus is a rectangle-->This is NOT always true when the rhombus has not right angles.

-True --> A square is a special type of rectangle because it possesses all the properties of a rectangle.

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Joan and her brother Justin left a hotel at the same time, driving in opposite directions at constant rates. After traveling for
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Answer:

Joan drive with a speed of 55 miles per hour.

Step-by-step explanation:

Given:- Travelling time (t) = 4 hours.

Travelled distance (d) = 480 miles.

Speed of Justin is 10 miles per hour faster than Joan.

To find:- Speed of Joan = ?

Solution:-

Let speed of Joan be x,

therefore speed of Justin = x+10          ---------------(from given)

Now, Total speed of Joan and Justin = x+x+10

Total speed of Joan and Justin = 2x+10 ------------(1)

Now formula for speed is,

Speed = \frac{distance}{time}

2x+10=\frac{480}{4}                        -------------(from 1 and given)

2x+10=120

2x=120-10

2x=110

\therefore x=\frac{110}{2}

\therefore x= 55

as x is the speed of Joan,

Therefore Joan drive with a speed of 55 miles per hour.

6 0
3 years ago
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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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