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LekaFEV [45]
2 years ago
6

If anyone needs something to talk about or just needs somebody to talk too, You can comment and I'll reply as soon as possible.

I want to help people and give them someone to talk too. I know a lot of people are going through things and I wanna help you guys get over it. You can answer or comment. Thank You!! Btw A LOT OF PIONTS!!!
I am always here to help if anyone needs it!
Mathematics
2 answers:
vladimir2022 [97]2 years ago
6 0

Answer:

<u>okurrrrr</u>

Step-by-step explanation:

exis [7]2 years ago
3 0

Answer:

I have PTSD.

Step-by-step explanation:

It affects my life very negatively and I've tried for a long time to get over it. My own question is: Will I ever get over it..?

You might be interested in
Find the least common denominator of -7/x and -5/6x^2
Jlenok [28]
That is  6x^2

Both x and 6x^2 will divide into 6x^2
7 0
3 years ago
The vertices of a parallelogram are A(x1, y1), B(x2, y2), C(x3, y3), and D(x4, y4). Which of the following must be true if paral
Iteru [2.4K]

The answer is really none of the above, because all of these have divisions by difference in x, and there are perfectly fine rectangles where those will mean dividing by zero.

To do the problem the way they want us to, we note segments with the same slope are parallel (or collinear); segments with slopes which multiply to -1 are perpendicular.

Let's figure out what each choice is trying to tell us by translating it into parallel and perpendicular. Remember A is point 1, ...

A. ((y_4-y_3)/(x_4-x_3)= (y_3-y_2)/(x_3-x_2)) and ((y_4-y_3)/(x_4-x_3)×(y_3-y_2)/(x_3-x_2))=-1

translated, that's CD║BC and CD⊥BC - contradictory; second half right

B. (y_4-y_3)/(x_4-x_3)= (y_2-y_1)/(x_2-x_1) and ((y_4-y_3)/(x_4-x_3)×(y_2-y_1)/(x_2-x_1))=-1

CD ║ AB and CD ⊥ AB - only the parallelogram half is right

C. (y_4-y_3)/(x_4-x_3)= (y_2-y_1)/(x_2-x_1) and (y_4-y_3)/(x_4-x_3)×(y_3-y_2)/(x_3-x_2)=-1

CD║AB and CD⊥BC - that's TRUE

D. (y_4-y_3)/(x_4-x_3)= (y_3-y_1)/(x_3-x_1) and (y_4-y_3)/(x_4-x_3)×(y_2-y_1)/(x_2-x_1)=-1

CD║AC and CD⊥AB - nope

Answer: C

The way I'd get the proper expression is with the dot product.

A parallelogram is a rectangle when adjacent sides are perpendicular. It only takes one right angle to make them all right.

Two sides are perpendicular when the dot product of their direction vectors is zero. All the answers have y_4 - y_3 so one side is CD. The other side must be BC or AD; AD would give y_4 - y_1 terms which don't appear among the answer, so let's go with BC.

The direction vectors are

D-C = (x_4 - x_3, y_4 - y_3)

C-B = (x_3 - x_2, y_3 - y_2)

For perpendicularity we need a zero dot product:

0 = (D-C)\cdot(C-B) = (x_4 - x_3)(x_3 - x_2) + (y_4 - y_3)(y_3 - y_2)

- (x_4 - x_3)(x_3 - x_2) = (y_4 - y_3)(y_3 - y_2)

That's the correct expression, given it's a parallelogram, to demonstrate it's a rectangle. The divisions make it iffy.

8 0
2 years ago
Can u help me answer dis
gavmur [86]

Answer:

the base is 10 and the height is 6.4

3 0
2 years ago
THERE WAS A HALF CLASS OF WATER IN A FRACTION HOW MUCH WATER WOULD 3 PEOPLE GET?
kkurt [141]

Answer:

0.16

Step-by-step explanation:

you divide 1/2 by 3 to 0.16666666 but it would recuce to 0.16

6 0
3 years ago
Simplify 2s + 4 + (-6s) +10
erma4kov [3.2K]

Answer:-4s+14

Step-by-step explanation: combined like terms.

2s-6s= -4s, 4+10=14

3 0
3 years ago
Read 2 more answers
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