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3 years ago

Can you please put steps swell

Mathematics

1 answer:

Artist 52 [7]3 years ago

6 0

Step-by-step explanation:

If the vector CD is a multiple of the vector BC

(CD = kBC, where k is a real constant

and k =/= 0),

Then BCD is a straight line.

Vector BC = Vector BA - Vector CA

= (5a - 2b) - (3a + b) = (2a - 3b).

Vector CD = Vector CA + Vector AD

= (3a + b) + (3a - 10b) = (6a - 9b)

Since 3(2a - 3b) = (6a - 9b), => k = 3,

The points B, C and D are collinear.

Hence we conclude BCD is a straight line.

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Can someone please help me?

kogti [31]

Answer:

4 + √15 > 3 + √6

Step-by-step explanation:

Hi there !

√15 ≈ 3.87

4 + 3.87 = 7.87

√6 ≈ 2.44

3 + 2.44 = 5.44

7.87 > 5.44

4 + √15 > 3 + √6

Good luck !

5 0

4 years ago

Which of the following shows that ABCD is a parallelogram for x=6 and y =8? (20 points)

Reika [66]

Answer:

AB = CD = 44 and BC = AD = 31 ; so ABCD is a parallelogram

Step-by-step explanation:

A parallelogram should have two pairs of parallel sides meaning the length of side AB should be the same as the length of side CD and the length of side AD should be the same as the length of side BC.

First, lets see if line AB is parallel to line CD.

Let's start by finding out the length of line AB.

Since we know x = 6 we will replace x with 6 in the expression:

7(6) + 2 = 42 + 2 = 44

Now that we know the length of line AB is 44, lets find the length of line CD by replacing x with its value of 6:

9(6) - 10 = 54 - 10 = 44

Now that we know the length of line CD is 44, we can see that line AB is parallel to line CD since they both have the same length of 44.

Now, lets see if line BC is parallel to line AD.

Let's start by finding out the length of line BC.

Since we know y = 8 we will replace y with 8 in the expression:

3(8) + 7 = 24 + 7 = 31

Now that we know the length of line BC is 31, lets find the length of line AD by replacing y with its value of 8:

5(8) - 9 = 40 - 9 = 31

Now that we know the length of line AD is 31, we can see that line BC is parallel to line AD since they both have the same length of 31.

Conclusion

ABCD is a parallelogram because it contains two parallel sides.

5 0

3 years ago

What is the Value Of X 2 --- X = 4 3

SashulF [63]

2
— x =4
3

3* 2/3 x = 4*3

2x=12
_____

2x = 2

X= 6

3 0

3 years ago

If x=7cm what is the surface area of the geometric shape formed by this net

Mekhanik [1.2K]

There are four rectangles and 2 squares.

Let’s start with the four rectangles.
4 [ 2x(x)]
4 [ (2*7)(7)] = 392 cm^2
______________

Next, let’s find the SA for the two squares.
2 [(2x)^2]
** I need to be clear that both the 2 and the x in the parentheses are squared because the square, of course, is a “perfect square”. This was probably obvious and needless to say, haha oh well.
Next step: plug in values
2 [ [2(7)]^2 ] = 392 cm^2

TOTAL: 392+392 = 784 cm^2

Wow I should have realized the the 4 rectangles are the area as the two squares.

Good luck to you!
If you have any other math questions, I can try my best to answer them. Just send me a comment or whatever works.

7 0

3 years ago

in the first quadrant you start at 11,8 and move 9 units left and 3 units up what point will you end up on

Umnica [9.8K]

Eleven subtract nine is two; eight adding three is eleven (2,11)

8 0

3 years ago