34. subtract the sum of 5x® + 2x² - 5 and 15x – xº-2xfrom the sum of 9 + 7x - 3x2 and 4x - 7 - 2
section - d​

Step-by-step explanation:

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(9+7x-3x+4x-7-2x)-(5x+2x^2-5+15x-x-2x)

(9-7+7x-3x+4x-2x)-(5x+15x-x-2x+2x^2-5)

(2+6x)-(2x^2+7x-5)

2+6x-2x^2+7x-5

2x^2+6x+7x+2-5

2x^2+13x-3is ur answer

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-20 SHOULD BE SUBTRACTED FROM -7 TO GET 13

Step-by-step explanation:

= -7 - (-20)

= -7 + 20

= 13

0 is the results

m i right

0

Step-by-step explanation:

1)answer have possible that 136/164 (B) is the answer

12. Find the following sums.

(a) (-4) + 3+ (-5)

Ans:-1-5=-6

(b) 5 + (-2) + (-5)

Ans:5-2-5=5-7=-2

(c) 16+ (-4) + (-7)

Ans:16-4-7=16-11=5

(d) (-4) + (15) + (-12)

Ans:-4+15-12=-4+3=-1

(e) (-25) + (50) + 20

Ans:-25+50+20=-25+70=45

(f) (40) + (-5) + (-20)

Ans:40-5-20=40-25=15

(13) Subtract

(a) - 7 from - 8

Ans:-8-7=-15

(b) 4 from – 15

Ans:-15+4=-11

(c) - 17 from 25

Ans:25-17=8

(d) 15 from 35

Ans:35-15=20

(14) Simplify

(a) - 50 + 20 - 30 + 40

Ans:-30+10=-20

(b)- 5+7-5+ 2-5

Ans:12-5-3=4

(c) 4+ (-5) + (-7)

Ans:4-5-7=4-12=-8

(d) 16 + (-17) + 20

Ans:16-17+20=-1+20=19

Thank You

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2x-9y is the correct answer

Step-by-step explanation:

here's the explanation for the question

answer:

a shopkeeper marks price of article 40% above its cost price and gives costumer a discount of 15% so that he gains rs76 on the article, find marked price of article

direct method =fixi/fi