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Sidana [21]
3 years ago
15

the sum of two numbers is-5.When twice the first number is added to the second number the result is -2,find the two numbers

Mathematics
2 answers:
juin [17]3 years ago
8 0

Answer:

Step-by-step explanation:

First write the question as an equation

x+y = -5

2x+y = -2

From the given equations, we can create a third one.

x+y+2x+y = -7 or 3x+2y = -7

Use trial and error method for the possible values x and y

We know that at least one of these two have to be negative.

x can be 1, in which case y has to be 5.

Check this for

x+y ≠ -5

x can be -1

Try another one where x = -1 and y has to equal -2

Check this

X

x+y = -5

but,

2x+y ≠ -2

Another one,

SSSSS [86.1K]3 years ago
7 0

Answer:

3 and -8

3 x 2 = 6

6 + -8 = 2

3 + -8 = 5

You have to find out which numbers add up to -5

Mainly trial and error

Step-by-step explanation:

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Step-by-step explanation:

1700/2800 = around .61 so 61%

5 0
3 years ago
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Answer:

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Step-by-step explanation:

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8 0
3 years ago
Given: △ABC, BC>AC, D∈ AC , CD=CB Prove: m∠ABD is acute
Aleksandr [31]

Answer:

Step-by-step explanation:

Given: △ABC, BC>AC, D∈ AC , CD=CB

To prove: m∠ABD is acute

Proof: In ΔABC, the angle opposite to side BC is ∠BAC and  the angle opposite to side  AC is ∠ABC.

Now, it is given that  BC>AC, then ∠BAC>∠ABC..                       (1)

In ΔBDC, using the exterior angle property,

∠ADB=∠DBC+∠BCD

∠ADB=∠DBC+∠BCA

⇒∠ADB>∠BAC                            (2)

From equation (1) and (2), we get

∠ADB>∠BAC

⇒∠ADB>∠ABC

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Hence,    m∠ABD is acute            

4 0
4 years ago
Lines g, h, and l are parallel and m< 2 = 129°.
liubo4ka [24]
<12 would be A (51 degrees) because 2 and 10 are corresponding angles and there are 180 degrees on a straight line!
Hope this helps :)
5 0
3 years ago
Read 2 more answers
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