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3 years ago

Sin(2x)=sin(4x) Solve

Mathematics

1 answer:

Anna11 [10]3 years ago

8 0

Sin(2x)-sin(4x)=0
-2cos(3x)sin(x)=0
x=pi/6+2kpi/3
x=pi/2+2kpi/3, k=no solution
x=2kpi
x=pi+2kpi

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The class was given a test that had a total of 125 points possible. A student then earned an 84% on the test. What are the total

Ganezh [65]

Answer:

Step-by-step explanation:

84/100 = x/125

x = 105 points

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3 years ago

A circle has a radius of 19m . find the degree measure of the central angle θ that intercepts an arc of length 4m .

arlik [135]

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3 years ago

Quadrilateral RPQS is a rectangle. Label the missing measures.

Taya2010 [7]

Answer:

Part 1) $PR=9\ units$

Part 2) $PQ=12\ units$

Part 3) $PS=15\ units$

part 4) $QR=15\ units$

Part 5) $RT=7.5\ units$

Step-by-step explanation:

we know that

In a rectangle opposite sides are parallel and congruent

The measure of each interior angle is 90 degrees

The diagonals are congruent and bisect each other

step 1

Find the length of side PR

we know that

$PR=QS$ ----> by opposite sides

we have

$QS=9\ units$

therefore

$PR=9\ units$

step 2

Find the length of side PQ

we know that

$PQ=RS$ ----> by opposite sides

we have

$RS=12\ units$

therefore

$PQ=12\ units$

step 3

Find the length of diagonal PS

we know that

$PS=2PT$ ---> the diagonals bisect each other

we have

$PT=7.5\ units$ ---> given problem

therefore

$PS=2(7.5)=15\ units$

step 4

Find the length of diagonal QR

we know that

$QR=PS$ ---> the diagonals are congruent

we have

$PS=15\ units$

therefore

$QR=15\ units$

step 5

Find the length of RT

we know that

$QR=2RT$ ---> the diagonals bisect each other

we have

$QR=15\ units$

substitute

$15=2RT\\RT=7.5\ units$

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3 years ago

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coldgirl [10]

Answer:

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Step-by-step explanation:

If you plug in the point into each equation, you get:

y = 1/9x

18 = 1/9 * 2

18 = 2/9

not true

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18 = 18 * 2

18 = 36

not true

y = 9x

18 = 9 * 2

18 = 18

true, so this is the answer

y = 2x

18 = 2 * 2

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not true

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3 years ago

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EleoNora [17]

504in2
LxWxH
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2 years ago