Quadrilateral ABCD has diagonals that are congruent and perpendicular to each other. What classification can be given to ABCD?

1 answer:

5 0

Rhombus is a quadrilateral that has 4 congruent sides and diagonals bisect angles and diagonals which are perpendicular. Squares, rectangles and parallelograms do not have diagonals that are perpendicular. Answer thus is C. rhombus

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How many gallons of a 80% antifreeze solution must be mixed with 100 gallons of 20% antifreeze to get a mixture that is 70% a

Blababa [14]

To Find :

How many gallons of a 80% antifreeze solution must be mixed with 100 gallons of 20% antifreeze to get a mixture that is 70% antifreeze.

Solution :

Let, x gallons of 80% antifreeze solution is required :

So,

$(x \times 80) + ( 100 \times 20 ) = (x + 100 )\times 70\\\\8x + 200 = 7( x + 100)\\\\x = 500$

Therefore, 500 gallons of 80% antifreeze solution is required.

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Marysya12 [62]

Answer:

Step-by-step explanation:

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MariettaO [177]

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