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3 years ago

11

Brianna makes $9.60 per hour. She worked 5 hours and 40 minutes on Saturday. On Sunday she worked for 1 hour and 10 minutes less

than she did on Saturday. How much money did Brianna make combined on Saturday and Sunday?

1 answer:

valentina_108 [34]3 years ago

3 0

She made 69.31 bucks

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A barrel contained 60 gallons of water. Water leaked out of the barrel at a rate of 6 gallons every 3 days. At this rate, how ma

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3 years ago

What are the factors of x2 – 100?

Komok [63]

Answer:

$(x+10)(x-10)$

Step-by-step explanation:

Given : $x^{2} -100$

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Solution:

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Since 100 = $10^{2}$

$x^{2} -10^{2}$

using property : $a^{2} -b^{2} =(a+b)(a-b)$

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Read 2 more answers

Sum and difference tan(135+30)

Mumz [18]

$\tan(x+y)=\dfrac{\sin(x+y)}{\cos(x+y)}=\dfrac{\sin x\cos y+\sin y\cos x}{\cos x\cos y-\sin x\sin y}=\dfrac{\tan x+\tan y}{1-\tan x\tan y}$

So,

$\tan(135^\circ+30^\circ)=\dfrac{\tan135^\circ+\tan30^\circ}{1-\tan135^\circ\tan30^\circ}$

You should know that $\tan135^\circ=-1$ and $\tan30^\circ=\dfrac1{\sqrt3}$

Putting everything together,

$\tan(135^\circ+30^\circ)=\dfrac{-1+\dfrac1{\sqrt3}}{1-(-1)\left(\dfrac1{\sqrt3}\right)}=\dfrac{1-\sqrt3}{\sqrt3+1}=\sqrt3-2$

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