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sweet [91]
2 years ago
8

Someone please help me

Mathematics
1 answer:
pickupchik [31]2 years ago
5 0
The answer for this question is -3
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6. In the circle below, chords AB and CD intersect at E. If mBD = 70° and mZAEC = 110° , find mAC
Kitty [74]

Answer:

mAC=70°

Step-by-step explanation:

Someone can corroborate this but:

180°-110=70°=(m<aed)

180°-(m<aed)=70°

mAC=mBD

7 0
3 years ago
4 less than the difference between 8 and -9
ElenaW [278]
The difference between 8 and -9 is 17.

4 less than that is 13.
3 0
3 years ago
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2cos^2(x)-5cos(x)+2=0
Basile [38]
2cos^2x-5cos+2=0\\\\cosx=t\in < -1;\ 1 >\\\\2t^2-5t+2=0\\\\a=2;\ b=-5;\ c=2\\\\\Delta=b^2-4ac;\ \Delta=(-5)^2-4\cdot2\cdot2=25-16=9\\\\t_1=\frac{-b-\sqrt\Delta}{2a};\ t_2=\frac{-b+\sqrt\Delta}{2a}\\\\t_1=\frac{5-\sqrt9}{2\cdot2}=\frac{5-3}{4}=\frac{2}{4}=\frac{1}{2}\in < -1;\ 1 >\\\\t_2=\frac{5+\sqrt9}{2\cdot2}=\frac{5+3}{4}=\frac{8}{4}=2\notin < -1;\ 1 >

cosx=\frac{1}{2}\to x=\frac{\pi}{3}+2k\pi\ \vee\ x=-\frac{\pi}{3}+2k\pi\ \ \ (k\in\mathbb{Z})
8 0
3 years ago
Read 2 more answers
rick believes the two expressions 4(3a-3) +2a and 14a-3 are equivalent. is he correct? explain why or why not?
Anni [7]
12a-12+2a = 14a-3
14a-12 = 14a-3

So he’s not correct.
6 0
3 years ago
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100 POINTS! <br><br> PLEASE HELP! <br><br> ASAP!<br><br> Best way to study for a math test?
Ksju [112]

Answer:

practice as many questions as you can.

4 0
2 years ago
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