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Reil [10]
3 years ago
8

Write each percent increase or decrease as a percentage of the initial amount.

Mathematics
2 answers:
True [87]3 years ago
7 0

Answer:

?

Step-by-step explanation:

olya-2409 [2.1K]3 years ago
5 0

Answer:

18%

Step-by-step explanation:

You might be interested in
(a) Find a vector parallel to the line of intersection of the planes −4x+2y−z=1 and 3x−2y+2z=1.
valentinak56 [21]

Find the intersection of the two planes. Do this by solving for <em>z</em> in terms of <em>x</em> and <em>y </em>; then solve for <em>y</em> in terms of <em>x</em> ; then again for <em>z</em> but only in terms of <em>x</em>.

-4<em>x</em> + 2<em>y</em> - <em>z</em> = 1   ==>   <em>z</em> = -4<em>x</em> + 2<em>y</em> - 1

3<em>x</em> - 2<em>y</em> + 2<em>z</em> = 1   ==>   <em>z</em> = (1 - 3<em>x</em> + 2<em>y</em>)/2

==>   -4<em>x</em> + 2<em>y</em> - 1 = (1 - 3<em>x</em> + 2<em>y</em>)/2

==>   -8<em>x</em> + 4<em>y</em> - 2 = 1 - 3<em>x</em> + 2<em>y</em>

==>   -5<em>x</em> + 2<em>y</em> = 3

==>   <em>y</em> = (3 + 5<em>x</em>)/2

==>   <em>z</em> = -4<em>x</em> + 2 (3 + 5<em>x</em>)/2 - 1 = <em>x</em> + 2

So if we take <em>x</em> = <em>t</em>, the line of intersection is parameterized by

<em>r</em><em>(t)</em> = ⟨<em>t</em>, (3 + 5<em>t</em> )/2, 2 + <em>t</em>⟩

Just to not have to work with fractions, scale this by a factor of 2, so that

<em>r</em><em>(t)</em> = ⟨2<em>t</em>, 3 + 5<em>t</em>, 4 + 2<em>t</em>⟩

(a) The tangent vector to <em>r</em><em>(t)</em> is parallel to this line, so you can use

<em>v</em> = d<em>r</em>/d<em>t</em> = d/d<em>t</em> ⟨2<em>t</em>, 3 + 5<em>t</em>, 4 + 2<em>t</em>⟩ = ⟨2, 5, 2⟩

or any scalar multiple of this.

(b) (-1, -1, 1) indeed lies in both planes. Plug in <em>x</em> = -1, <em>y</em> = 1, and <em>z</em> = 1 to both plane equations to see this for yourself. We already found the parameterization for the intersection,

<em>r</em><em>(t)</em> = ⟨2<em>t</em>, 3 + 5<em>t</em>, 4 + 2<em>t</em>⟩

3 0
2 years ago
Round to 1 significant figure and estimate 423 x 764
Elden [556K]

Answer:

300,000

Step-by-step explanation:

423 x 764 = 323,172

8 0
1 year ago
What is the value of x in the equation 6(x − 2) − 4x = 16?   A x=14 x=14 B x=4 x=4 C x=2 x=2 D x=12 x=12
prohojiy [21]

Answer:

A)    x=14

Step-by-step explanation:

hello :

6(x − 2) − 4x = 16

6x-12 -4x =16

2x-12=16

add 12 : 2x=16+12

2x= 28

x=28/2=14

5 0
3 years ago
Chec
nexus9112 [7]

Answer:

Functions: y = -x + 11, y = 2x^2 - 6x + 4, y = 7

Not Functions: x = 3, x^2 + y^2 = 81, y^2 = -5x - 12

8 0
2 years ago
Which ratio is equivalent to 4:10? Choose ALL the equivalent ratios from i-ready
Kobotan [32]

<u>Answer:</u>

<u>2:5 is the simplified form.</u>

<u>Step-by-step explanation:</u>

  • 4:10
  • => 4/10
  • => 2/5
  • <u>=> </u><u>2:5</u>

<u>Conclusion:</u>

<u>Therefore, the simplified form of 4:10 is</u><u> 2:5.</u>

Hoped this helped.

BrainiacUser1357

7 0
2 years ago
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