3 years ago

Can anyone help me on #7 and #8

Mathematics

2 answers:

Leno4ka [110]3 years ago

8 0

This is all you have to do.

nika2105 [10]3 years ago

8 0

See my picture reply.

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-38=-2(n+6)+6(3n+1) Can you please solve marking branlest show work

r-ruslan [8.4K]

Answer:

n = -2

Step-by-step explanation:

-38 = -2n -12 +18n +6

-38 =16n -6

-38 +6 =16n

-32= 16n

n=-2

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2 years ago

HELP PLEASEE<br><br> Multiply negative 1 over 6 multiplied by negative 1 over 5

navik [9.2K]

Negative 1 over 11
negative 1 over 30
1 over 30
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2 years ago

What is the ratio of purple cylinders to total cylinders, there are 7 purple and 1 yellow.

Dominik [7]

Answer:

7:8

Step-by-step explanation:

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3 years ago

If 2^21 = x + 2^20, what is the value of x ?

andrew-mc [135]

Answer:

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Step-by-step explanation:

4 0

3 years ago

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for v= 4i - 5j, find unit vector u in the direction of v, and write your answer as a linear combination of the standard unit vec

umka21 [38]

Answer:

a. $u=\frac{4\sqrt{41}i }{41}-\frac{5\sqrt{41}j}{41}$

Step-by-step explanation:

The given vector is v= 4i - 5j

The magnitude of this vector is;

$|v|=\sqrt{(-4)^2+(-5)^2}$

$|v|=\sqrt{16+25}$

$|v|=\sqrt{41}$

The unit vector u in the direction of v is;

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

$u=\frac{4i - 5j}{\sqrt{41}}$

$u=\frac{4i }{\sqrt{41}}-\frac{5j}{\sqrt{41}}$

We rationalize to get

$u=\frac{4\sqrt{41}i }{41}-\frac{5\sqrt{41}j}{41}$

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2 years ago

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