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matrenka [14]
3 years ago
6

Quy tắc suy luận nào là cơ sở của suy diễn sau: "Biết rằng: 2 đường thẳng d và d' song song hoặc cắt nhau. Ta đã có d không song

song với d'. Vậy d cắt d'
Select one:
a. Luật loại trừ
b. Luật rút gọn
c. Luật phản chứng
d. Luật tách rời
Mathematics
1 answer:
Travka [436]3 years ago
4 0

Answer: a

Step-by-step explanation:

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If ?2000 is placed into a bank account that pays 3% compound interest per year,how much will be in the account after 2 years?
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Answer:

There would be $2,120

Step-by-step explanation:

First figure out what 3% of 2000 is which is 60. Multiply the 60 by 2 to get 120 then add 120 to 2000

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3 years ago
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Could someone help me please ​
Alexxx [7]

1. 3x+9-9=18-9      

3x=9

x=3

2. 4x-12=20

4x-12+12=20+12

4x=32

x=8

3. x+0-0

x=0

4. x/2-2+2=9+2

x/2=11

(2)(x/2)=11(2)

x=22

5. 12x-21=3

12x-21+21=3+21

12x=24

x=2

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3x-15+15=18+15

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7. 3x-25=14

3x-25+25=14+25

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3x+16-16=22-16

x=2

9. 2x-8=2

2x-8+8=2+8

2x=10

x=5

10. 9x-18=9

9x-18+18=9+18

9x=27

x=3

11. x+0=0

x=0

12. 9x-8=19

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If  you want to check my answers

use substitution method by using the x into for each equation.

7 0
3 years ago
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Using substitution, identify it the given point is a solution of the given linear inequality.
yuradex [85]

Answer:

no

Step-by-step explanation:

substitute the values from (x,y) into the equation.

3(-1)+2(2)>6

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false

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Answer:

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Step-by-step explanation:

Simplify the expression.

sine of x to the second power minus one divided by cosine of negative x

(1−sin2(x))/(sin(x)−csc(x))

sin2x+cos2x=11−sin2x=cos2x

cos2(x)/(sin(x)−csc(x))csc(x)=1/sin(x)cos2(x)/(sin(x)− 1/sin(x))= cos2(x)/((sin2(x)− 1)/sin(x))sin2(x)− 1=-cos2(x)cos2(x)/(( -cos2(x))/sin(x))

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3 0
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