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3 years ago

Vectors, I need help plz

Mathematics

1 answer:

Aloiza [94]3 years ago

8 0

DC :AB=3:2 can be written as

DC/AB=3/2

Then you can get the answers easily

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Line E passes through the points (2, 3) and (4, -3). What is the slope of a line perpendicular to line E?

lilavasa [31]

$\bf \begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&&(~ 2 &,& 3~) 
% (c,d)
&&(~ 4 &,& -3~)
\end{array}
\\\\\\
% slope = m
slope = m\implies 
\cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{-3-3}{4-2}\implies \cfrac{-6}{2}\implies \cfrac{-3}{1}$

now, a line perpendicular to that one, will have a "negative reciprocal" slope, thus

$\bf \textit{perpendicular, negative-reciprocal slope for}\quad \cfrac{-3}{1}\\\\
negative\implies +\cfrac{3}{ 1}\qquad reciprocal\implies +\cfrac{ 1}{3}\implies \cfrac{1}{3}$

7 0

3 years ago

What is the MAD of the numbers (Round to the nearest tenth.)<br><br> 9,7,6,8,6,6

uranmaximum [27]

Answer:

The MAD is 1

Step-by-step explanation:

See attached picture

6 0

3 years ago

Please please help me out

mihalych1998 [28]

Answer:

A trinomial of degree 5

Step-by-step explanation:

A monomial has only 1 term

A binomial has 2 terms

A trinomial has 3 terms

4 $x^{5}$ + 3x³ - 7x ← has 3 terms and is therefore a trinomial

The degree of a polynomial is determined by the largest exponent of the variable in the expression

4 $x^{5}$ is the term with the largest exponent in the expression

Hence a polynomial of degree 5

6 0

3 years ago

Question 4 of 30

Gemiola [76]

Answer:

1/36

Step-by-step explanation:

prob of each dice is 1/6

=1/6 * 1/6

6 0

2 years ago

11. Find the value of x.<br>(6x + 7)<br>(8x - 17)

Leto [7]

Answer:

X= -7/6, 17/8

Step-by-step explanation:

Foil it, then use quadratic to find zeros/roots.

6 0

3 years ago