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zavuch27 [327]
3 years ago
5

The following set of coordinates represent which figure?(7,10) (4,7) (6,5) (9,8)

Mathematics
2 answers:
IRINA_888 [86]3 years ago
7 0

Let's assume these are the vertices in order and calculated the squared lengths of the sides.  Let's calculate the vector for each side, which is the difference of the endpoints:

(7,10) - (4,7) = (3, 3)

(4,7) - (6,5) =(-2, 2)

(6,5) - (9,8) = (-3, -3)

(9,8) - (7,10) = (2, -2)

We see the pattern: (3,3) = -(-3,-3) and (-2,2) = -(2,-2)

We have two pairs of opposite vectors so we have a parallelogram.

Let's check the dot product of adjacent sides:

(3,3) . (-2, 2) = 3(-2) + 3(2) = 0

Zero dot product, we have perpendicularity. A parallelogram with one right angle is a

Answer: Rectangle

The adjacent sides are clearly not congruent  so it's not a square

.

Crank3 years ago
3 0

Answer: i think a diamond

Step-by-step explanation:

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Answer:

C.

Step-by-step explanation:

So there are 20 kids with brown hair and this represents 80% of the class total.

So this means 20=.8n since we don't know the total number of kids.

20=.8n

Divide both sides by .8

25=n

So 25 is the total number of kids.

C. is the answer

You could also setup this equation given that 80% is 80/100:

[tex]\frac{20}{\text{ total }}=\frac{80}{100}

To figure out what that total is there you can divide top and bottom of the fraction on right hand side by 4 which gives you the 20 on top and the 25 on bottom.

5 0
4 years ago
The dress store is having a sale where all merchandise is 1/4 off. A woman buys $36 of merchandise at the sale price. What would
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3 0
4 years ago
the tank is 600 cubic meters. the height of tank is 6 meters. the base of the tank is square what is the side of the side of the
harkovskaia [24]
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base is a squeare, so base=side²

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side²=100 m²
side=√(100 m²)=10 m.

answer: the side of the base is 10 m.
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HELP ASAP!!! make sure to submit a pic of the graph!
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Answer:

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Hi.., I hope your having a nice day :)) ... but I’m not to good with percents so I really need help on this question ... Thanks!
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Step-by-step explanation:

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