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Oliga [24]
3 years ago
15

Solve each equation. Showing your reasoning. X^2-6x-20=7

Mathematics
1 answer:
scoundrel [369]3 years ago
4 0

Answer:

x=-3,x=9

Step-by-step explanation:

x^2-6x-20-7=0

x^2-6x-27=0

x^2-(9-3)x-27=0

x^2-9x+3x-27=0

x(x-9)+3(x-9)=0

(x+3)(x-9)=0

x=-3,x=9

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Answer:

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Step-by-step explanation:

STIL YOUR MOM

5 0
3 years ago
Please help if you’re good at math<br><br><br><br> need an answer asap!!
mars1129 [50]

Answer:

Zero real roots:

f(x) = x^2-x+1

f(x) = x^2+2x+3

One real root:

Two real roots:

f(x)=x^2+2x+1

f(x)=x^2-3x+2

Step-by-step explanation:

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8 0
3 years ago
If tan theta = 12/5 and cos theta &lt; 0, what is sin theta ?
Talja [164]
1 + tan ² Ф=sec²Ф
1+(12/5)²=sec²Ф
169/25=sec² Ф
sec Ф=⁺₋√(169/25)=⁺₋13/5

sec Ф=1/cos Ф ⇒cosФ=1/sec Ф
 cos Ф>0   ⇔  sec Ф>0  ⇔  sec Ф=+ 13/5

cos Ф=1/secФ
cos Ф=1 / 13/5=5/13

we can calculate the sin Ф, with this method.
sin²Ф + cos²Ф=1  ⇒ sin Ф=⁺₋√(1-cos² Ф)
sin Ф=⁺₋√[1-(5/13)²]=⁺₋12/13
like cos Ф>0 and tan Ф>0   ⇒ sin Ф>0 ⇒sin Ф=12/13

answer: d.12/13

other method
tan Ф=sin Ф / cos Ф
12/5=sin Ф / 5/13
sin Ф=(12/5)*(5/13)=12/13

answer: d.12/13

8 0
3 years ago
Which of these trends represents an inverse variation?
BaLLatris [955]

I think it is the first one could be wrong tho

8 0
3 years ago
Show me a graph that best represents the solution set to the system of a linear inequalities; y-x&gt;0. y-1&gt;0
tangare [24]
<h2>Answer:</h2>

The graph is shown in the attached image

4 0
3 years ago
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