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dsp73
3 years ago
8

The amount of money earned varieties directly with the numbers of hours spent babysitting .If Kayla baby sits for 3 hours she wi

ll earn $27 how many hours will she earn if she babysits for 4 hours
Mathematics
1 answer:
algol133 years ago
4 0

Answer:

$36

Step-by-step explanation:

Step 1. Create a ratio of hours to dollars

3 hours : 27 dollars can be simplify to 1 hour : 9 dollars

Step 2. Find the answer

Given the unit rate of 9 dollars per hour, find how much money Kayla can make in 4 hours.

4 x 9 is 36

The answer is 36 dollars

Hope this helps :)

Have a nice day!

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If tanA=a <br>then find sin4A-2sin2A/ sin4A+2sin2A​
anygoal [31]

Answer:

The value of the given expression is

\frac{sin4A-2sin2A}{sin4A+2sin2A}=-a^2

Step by step Explanation:

Given that tanA=a

To find the value of \frac{sin4A-2sin2A}{sin4A+2sin2A}

Let us find the value of the expression :

\frac{sin4A-2sin2A}{sin4A+2sin2A}=\frac{2cos2Asin2A-2sin2A}{2cos2Asin2A+2sin2A} ( by using the formula sin2A=2cosAsinA here A=2A)  

=\frac{2sin2A(cos2A-1)}{2sin2A(cos2A+1)}

=\frac{(cos2A-1)}{(cos2A+1)}

=\frac{(-(1-cos2A))}{(1+cos2A)}(using  sin^2A+cos^2A=1  here A=2A)

=\frac{-(sin^2A+cos^2A-(cos^2A-sin^2A))}{sin^2A+cos^2A+(cos^2A-sin^2A)}(using cos2A=cos^2A-sin^2A here A=2A)

=\frac{-(sin^2A+cos^2A-cos^2A+sin^2A)}{sin^2A+cos^2A+(cos^2A-sin^2A)}

=\frac{-(sin^2A+sin^2A)}{cos^2A+cos^2A}

=\frac{-2sin^2A}{2cos^2A}

=-\frac{sin^2A}{cos^2A}

=-tan^2A  ( using tanA=\frac{sinA}{cosA} here A=2A )

 =-a^2 (since tanA=a given )

Therefore \frac{sin4A-2sin2A}{sin4A+2sin2A}=-a^2

6 0
3 years ago
A charity fair raised $6,000 by selling 500 lottery tickets. There were two types of lottery tickets: A tickets cost $10 each, a
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Answer:

it would be E

Step-by-step explanation:

20x60= 4800

480x10= 1200

4800+1200= 6000

6 0
3 years ago
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leonid [27]

Answer:

l=\frac{A-\frac{1}{2} \pi w^2}{2w}

Step-by-step explanation:

We essentially need to solve for l; in other words, we must isolate it to one side.

First, notice that the term \frac{1}{2} \pi w^2 doesn't have any l terms in it, so we can just move this to the left side by subtracting both sides by \frac{1}{2} \pi w^2:

A - \frac{1}{2} \pi w^2 = 2lw

Now, the right side has 2lw, so we must divide both sides by 2w to isolate l:

l=\frac{A-\frac{1}{2} \pi w^2}{2w}

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3 years ago
What is the x-intercept of the following equation?
ziro4ka [17]
Last one or the first one not sure don’t get my answer hopefully it was kinda helpful
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MZYX=pi/3 radians. Covert this radian measure to its equivalent degree measure.
vitfil [10]

Answer:

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Step-by-step explanation:

Angles can be converted from radians to degrees by multiplying by 180/π.

π/3 * 180°/π = 180°π /3π = 180/3 = 60°

60° is the measure of ZYX in degrees.

7 0
3 years ago
Read 2 more answers
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