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3 years ago

Plz help plz help will mark brainilest

Mathematics

1 answer:

melamori03 [73]3 years ago

5 0

Answer:

BC=4

Step-by-step explanation:

Use the distance formula

$\sqrt{} (7 - 3) ^{2} + (2 - 2) ^{2}$

$\sqrt{16}$

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Determine whether the points lie on straight line.

wel

Answer:

A) Non-collinear- does not lies on straight line

B) Collinear- lie on straight line

Step-by-step explanation:

We have to check collinearity of three points.

The points $(x_1, y_1, z_1),(x_2, y_2, z_2),(x_3, y_3, z_3)$ are said to be collinear if,

$\left[\begin{array}{ccc}x_1&y_1&z_1\\x_2&y_2&z_2\\x_3&y_3&z_3\end{array}\right] = 0$

A) A(2, 5, 3), B(3, 7, 1), C(1, 4, 4)

$\left[\begin{array}{ccc}2&5&3\\3&7&1\\1&4&4\end{array}\right] \\\\=2(28-4)-5(12-1)+3(12-7)\\= 8 \neq 0$

Thus, the given points are not collinear.

B) D(0,-5,5), E(1,-2,4), F(3,4,2)

$\left[\begin{array}{ccc}0&-5&5\\1&-2&4\\3&4&2\end{array}\right] \\\\=0(-4-16)+5(2-12)+5(4+6)\\=0$

Thus, the given points are collinear.

6 0

3 years ago

Find the 9th term of the geometric sequence whose common ratio is 1/2 and whose first term is 4.

ArbitrLikvidat [17]

Answer:

The 9th term is 1/64.

I hope it is correct ✌️

5 0

3 years ago

The difference of a number and ninety when a=102

WINSTONCH [101]

Answer:

It should be 12, assuming that a is a variable.

Step-by-step explanation:

a = 102

a - 90 = ?

102 - 90 = 12

Hope this helps.

8 0

3 years ago

What is the sum of the polynomials?<br> (7x^3– 4x^2) + (2x^3 +3x)

DaniilM [7]

Answer:

sum of the polynomials is $9 x^{3} - 4 x^{2} +3x$

Step-by-step explanation:

Given polynomial is (7 x^3– 4 x^2) + (2 x^3 +3 x)

adding x^3 terms, now we get

$(7+2)x^3-4 x^2+3 x$

$9 x^{3} - 4 x^2 +3 x$

Therefore the sum of given polynomial is

$9 x^3-4 x^2+3 x$

5 0

3 years ago

Help!! Lots of points!!

Yanka [14]

Answer:

the correct answer would b (B)

7 0

4 years ago

Read 2 more answers