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3 years ago

Factorise completely

1 answer:

4 0

1. Number that adds up to -12 and multiplied by the same # that gives u -13. Set it up like this because both are negative so, u need 1 negative and 1 positive.
(x-13)(x+1)

2. Same rule applies. GCF
8y(4y+1)

3. (x+3)(x-3)

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Find a unit vector in the same direction as the given vector: v = −14.5i + 2.5 j.

Elis [28]

ANSWER

$- \frac{29}{866} \sqrt{866} i + \frac{5}{866} \sqrt{866} j$

EXPLANATION

The given vector is v = −14.5i + 2.5 j.

The magnitude of this vector is

$|v| = \sqrt{ {( - 14.5)}^{2} + {2.5}^{2} }$

$v| = \sqrt{ {( - 14.5)}^{2} + {2.5}^{2} }$

$v| = \sqrt{ 216.5} = \frac{ \sqrt{866} }{2}$

The unit vector in the direction of this vector is

$= \frac{v}{ |v| }$

$= - \frac{14.5}{ \frac{ \sqrt{866} }{2} } i + \frac{2.5}{ \frac{ \sqrt{866} }{2} } j$

$= - \frac{29}{866} \sqrt{866} i + \frac{5}{866} \sqrt{866} j$

7 0

3 years ago

( 1/2 ) ^2<br> HELP!<br> ME!

VLD [36.1K]

Answer:

1/4 is the answer

just multiply 1/2 x 1/2

hope this helps

have a good day :)

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

What is 1 5/8 rounded to the nearest half A.1 B.1 1/2 C.2 D.2 1/2

Ipatiy [6.2K]

1 1/2 I think is the answer

4 0

3 years ago

Read 2 more answers

PLEASE HELP

Viefleur [7K]

7x²=9+x
so
for
0=ax²+bx+c

$x=\frac{-b+/-\sqrt{b^2-4ac}}{2a}$
so

7x²=9+x
mins 9 from both sides and minus x
7x²-1x-9=0
a=7
b=-1
c=-9

$x=\frac{-(-1)+/-\sqrt{(-1)^2-4(7)(-9)}}{2(7)}$
$x=\frac{1+/-\sqrt{(-1)^2+4(7)(9)}}{2(7)}$
so the 4th one

4 0

3 years ago

Write the equation of a line with an undefined slope and point (1, 7).

Sonja [21]

Answer:

The equation of straight line is x = 1

Step-by-step explanation:

<u>Step </u>:-

The equation of straight line having slope 'm' and passing through the point

$(x_{1} ,y_{1} )$ is $y-y_{1} = m (x-x_{1} )$