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katrin [286]
2 years ago
5

The sum of 9 and a number

Mathematics
2 answers:
Pie2 years ago
8 0
The expression is 9+x
Yuri [45]2 years ago
3 0

Answer:

E+ 9

Step-by-step explanation:

Let E represent a number.

The sum of nine and the number is then E+9 as "sum" denotes addition.

Therefore the representation would be E+9

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Write the following expression in standered form.<br><br> -3•2•a+5(-7b)+(12•c•4)
Alex

Answer:

−6a − 35b + 48c

Step-by-step explanation:

You do pemdas and if you know Pemads you will get your anwser

6 0
2 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
Percy plotted the points (5,6)
Annette [7]

Answer:

1,6 and 6,6

Step-by-step explanation:

since they are on the same y-axis, changing the x-value shouldn't matter.

3 0
3 years ago
Read 2 more answers
Help!!! Please!!! I’ll mark you brainliest first person to answer!!! :)
katovenus [111]
I think it would be 9, but the graph seems a bit unclear so I’m really sorry if that doesn’t help..
7 0
3 years ago
Select all names that apply.<br><br><br> 121<br> 121
Naily [24]

I don't understand the question

8 0
3 years ago
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