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3 years ago

I NEED HELPPP ASAP pleaseeeeeee

Mathematics

2 answers:

Komok [63]3 years ago

5 0

Answer:

Subtract 23 from both sides

Step-by-step explanation:

This is how algebra works, to get a variable by itself you have to do the opposite to both sides. Hope this helped.

maw [93]3 years ago

4 0

Answer:

It's D: subtract 23 from both sides of the equation because inverse operations

Step-by-step explanation:

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Which polynomial represents the area?

murzikaleks [220]

Answer:

A is the Answer.

Step-by-step explanation:

You multiply x with 2x ( Gives you 2x^2 ) then -1 with 2x ( Gives you -2x ) then -8 with x ( Gives you -8x ) then -1 with-8 ( Gives you +8 ), finally you add the two x's ( not x^2 ). Your fibal answer will be 2x^2 - 10x +8.

Hope this helps.

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4 years ago

Let a=<-4,-3,5> Find a unit vector in the same direction as having positive first coordinate.

Rashid [163]

Answer:

The value is $u = < \frac{2\sqrt{2}}{10} , \frac{3\sqrt{2}}{10} , - \frac{\sqrt{2}}{2}>$

Step-by-step explanation:

From the question we are told that

The vector is a=<-4,-3,5>

Generally the unit vector is $u = ay$

Here y represent the y-coordinate

$u =y$

=> $u =$

Generally the resultant of a unit vector is 1

$|u| = \sqrt{ (-4y)^2 + (-3y)^2 + (5y)^2} = 1$

Hence

$|u| = \sqrt{ 16y^2 + 9y^2 + 25y^2} = 1$

Taking the square of both sides

$16y^2 + 9y^2 + 25y^2 = 1$

=> $50y^2 = 1$

=> $y = \pm \frac{1}{\sqrt{50}}$

=> $y = \pm \frac{1}{5 \sqrt{2}}$

Rationalizing

=> $y = \pm \frac{\sqrt{2}}{10}$

Given that the first coordinate is positive

$y = - \frac{\sqrt{2}}{10}$

Hence the unit vector is

$u =$

=> $u = < \frac{2\sqrt{2}}{10} , \frac{3\sqrt{2}}{10} , - \frac{\sqrt{2}}{2}>$

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3 years ago

The scale used on a map is 5 millimeters represents 32 kilometers. How many millimeters represent 160 kilometers?

Anika [276]

Use the proportion formula:

5mm/32= Xmm/160

=22.22 mm

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3 years ago

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Dvinal [7]

Answer:

The vertex of angle is S.

Hope this helps!!

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4 years ago

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Sav [38]

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3 years ago