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lukranit [14]
3 years ago
15

Chứng minh mệnh đề sau bằng phương pháp phản chứng:

Mathematics
1 answer:
GalinKa [24]3 years ago
4 0

Answer:

Which language is this ?????

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(x+5)2−(x−2)=A<br> Need help!
valkas [14]
IF YOUR SOLVING FOR A THE ANSWER WOULD BE A=X+12

IF YOUR SOLVING FOR X IT WOULD BE X=-12+A
5 0
3 years ago
Solve for the x in the triangle .
Paladinen [302]
If you want the angle it’s 22

In all triangles the angles must add up to 180 so 68 + 90 =158 + 22 =180
5 0
2 years ago
Which expression is represented by the diagram?<br> o -6-(-1)<br> o -6-1<br> o -5-(-1)<br> o -5-1
cupoosta [38]

Option A:

–6 – (–1)

Solution:

Minus symbol are given in the diagram.

There are 6 minus symbol in the diagram.

From that expression 1 minus symbol is cancelled.

<em><u>To find which expression represents this situation:</u></em>

Option A: –6 – (–1)

Total number of minus = –6

From this cancel one minus: –6 – (–1)

–6 – (–1) = –6 + 1 = –5

So, remaining minus are –5.

This is the correct answer.

Option B: –6 –1

–6 –1 = –7

But note that remaining 5 minus are only there in the diagram.

So, this is not correct answer.

Option C: –5 – (–1)

Totally 6 minus in the problem. But here only 5 minus are given.

So, this is not correct answer.

Option D: –5 –1

Totally 6 minus in the problem. But here only 5 minus are given.

So, this is not correct answer.

Hence –6 – (–1) is the correct expression which represented the diagram.

8 0
3 years ago
Read 2 more answers
Find the missing measurement round your answer to the nearest tenth​
yarga [219]

Answer:

5

Step-by-step explanation:

Let, the unknown side be x.

1/2 × 6.6m × xm = 16.5m²

or, x= 33/6.6

x= 5

4 0
3 years ago
Parellel lines it says 75 degrees and on another line it says 11x-2 what's the answer?
likoan [24]

Answer:

x = 7

Step-by-step explanation:

Parallel lines so their the same

11x - 2 = 75

add 2 to both sides

11x = 77

divide both signs with 11

x = 7

8 0
3 years ago
Read 2 more answers
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