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3 years ago

What do they mean by choosing a mental strategy?

Mathematics

1 answer:

olga nikolaevna [1]3 years ago

6 0

What ways you can think of it on your head without using a pen or paper

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Help with this please

Alik [6]

Answer:

Yes, the given parallelogram is a rectangle.

Step-by-step explanation:

The vertices of parallelogram are J(-5,0), K(1,4), L(3,1) and M(-3,-3).

The slope formula is

$m=\frac{y_2-y_1}{x_2-x_1}$

$JK=\frac{4-0}{1-(-5)}=\frac{4}{6}=\frac{2}{3}$

$KL=\frac{1-4}{3-1}=\frac{-3}{2}$

$LM=\frac{-3-1}{-3-3}=\frac{-4}{-6}=\frac{2}{3}$

$JM=\frac{-3-0}{-3-(-5)}=\frac{-3}{2}$

The slopes of opposites sides are same it means they are parallel to each other.

The product of slopes of two consecutive sides is

$\frac{2}{3}\times \frac{-3}{2}=-1$

Since the product of slopes of two consecutive sides is -1, therefore the consecutive sides are perpendicular to each other.

Yes, the given parallelogram is a rectangle.

7 0

4 years ago

One more question 50 points

balu736 [363]

Answer:

5 complete scarves

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Which of the following ratios would form a proportion with 2/3?

Zolol [24]

B. 6/9 because 6/9 equal to 2/3 so it’s basically the same ratio

8 0

3 years ago

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A bag contains 7 marbles, of which I is orange,

lyudmila [28]

6/7 because only one marble is orange

5 0

3 years ago

What is the length of the hypotenuse

podryga [215]

Pythagoras’ Theorem = a^2+b^2=c^2

c^2= 5^2+12^2
=25+144
=169

c= sqrt of 169
c=13

Hypotenuse=13cm

7 0

3 years ago

Read 2 more answers