You earned a 90% on a science test. You answered 18 questions correctly. How many questions were on the test?

Mathematics

2 answers:

Kruka [31]2 years ago

8 0

This is an easy one!

Answer = 20.

(18/20) x 100 = 90%

So, 20 questions!

zalisa [80]2 years ago

5 0

There were twenty questions on the test, we can figure this out by writing your word problem as an equation: x= the amount of questions there are on the test, with this in mind the equation will be written out 18/x=90%, then do the same to both sides of the equation, divide both sides by .90 which gets rid of the x on the left side and 18 divided by .90 = 20. So X = 20.

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Carly draws quadrilateral JKLM with vertices J(-3,3), K(3,3), L(2,-1),and M(-2, -1). What is the best way to classify the quadri

Trava [24]

Answer:

Trapezoid

Step-by-step explanation:

The points are shown in the attached graph.

You can clearly see from the picture that it is a "Trapezoid".

Trapezoid is basically a quadrilateral (4 sided-figure) that has 1/2 pair of parallel sides.

On the other hand, a parallelogram has 2 pair of parallel sides.

Thus, a parallelogram is a special type of trapezoid where there are 2 pair of parallel sides. But trapezoid need not be a parallelogram.

The picture shows 1 pair of parallel sides, hence it is a trapezoid.