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STALIN [3.7K]
3 years ago
6

Find two numbers sum -12 and their difference is -2 (chapter integers,explanation also)

Mathematics
2 answers:
BaLLatris [955]3 years ago
5 0

Step-by-step explanation:

x+y=-12

x-y=-2

solve by simultaneous equations multiply the second equation by -1

-x-y=2

subtract both equations

y=10

x+10=-12

×=-22

Vsevolod [243]3 years ago
5 0

Answer:

-7 and -5

Step-by-step explanation:

a + b = -12

a - b = -2

2a = -12 + -2 = -14 ----> a = -7

-7 + b = -12 ---> b = -5

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WILL GIVE BRAINLST <br><br> hAVE AN AMAZING DAY
Serggg [28]

Answer:

3. 3 and 4

4. √9+√2, 8/3, √5 - 5, -π

Step-by-step explanation:

3. √46/2 is 3.39... which is between 3 and 4

4. √9+√2=4.4..

8/3=2.6...

√5-5= -2.7..

-π= -3.14..

(hope this helps :P)

7 0
3 years ago
What are the solutions of the system solve by graphing
Vladimir [108]
Vertex of x^2-2x-1 is (1,-2) so B is true
7 0
3 years ago
Find the sum of 1+2-3+4+5-6+7+8-9+...+97+98-99
Brums [2.3K]

Answer:

Hi,

Step-by-step explanation:

Let's make group of 3 numbers

1+2-3=0

4+5-6=3

7+8-9=6

...

97+98-99=96

s=1+2-3+....+97+98-99=0+3+6+..+96=3*(0+1+2+3+...+32)

=3*(32+0)*33/2

<u>=1584</u>

4 0
2 years ago
\250 doctors from three countries in Europe meeting in a conference to decide whether to approve a new vaccine for the flu. Amon
Bezzdna [24]

Answer:

0.683 = 68.3% probability that a randomly chosen doctor is in favor of the vaccine

Step-by-step explanation:

(a) What is the probability that a randomly chosen doctor is in favor of the vaccine

75% of 115/250 = 0.46(German).

60% of 65/250 = 0.26(French).

65% of 70/250 = 0.28(Englishmen). So

p = 0.75*0.46 + 0.6*0.26 + 0.65*0.28 = 0.683

0.683 = 68.3% probability that a randomly chosen doctor is in favor of the vaccine

8 0
3 years ago
How do you write 25/20 as a percentage
earnstyle [38]
\dfrac{25}{20}=\dfrac{25\cdot5}{20\cdot5}=\dfrac{125}{100}=1\dfrac{25}{100}=1.25=1.25\cdot100\%=\boxed{125\%}\\\\\dfrac{25}{20}=\dfrac{25}{20}\cdot100\%=25\cdot5\%=\boxed{125\%}
8 0
4 years ago
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