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3 years ago

Please help answer -7(2y-3x+9)

Mathematics

2 answers:

blondinia [14]3 years ago

7 0

Answer:

21x - 14y - 63

Step-by-step explanation:

Here you go :D

ANEK [815]3 years ago

4 0

Answer:

21x -14y -63

Step-by-step explanation:

First step we have to distribute -7 inside the parenthesis.

(-7)(2y) - (-7)(3x) +(-7) (9)

RULE 1: The product of a positive integer and a negative integer is negative. RULE 2: The product of two positive integers is positive.

RULE 3: The product of two negative integers is positive.

-14y+ 21x - 63

21x -14y -63

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Step-by-step explanation:

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4 years ago

It was estimated that because of people switching to Metro trains about 33000 of CNG 3300 tons of diesel and 21000 tons of petro

Simora [160]

The question is incomplete. Here is the complete question

It was estimated that because of people switching to Metro trains about 33000 of CNG 3300 tons of diesel and 21000 tons of petrol was saved by the end of year 2007 (I) find a fraction of the quantity of diesel saved to the quantity of petrol saved (ii) find the quantity of cng to the quantity of diesel saved

Answer:

(I) 11/70

(II) 1/10

Step-by-step explanation:

Metro trains contain 330,000 tons of CNG

3300 tons of diesel was saved

21000 tons of petrol was saved at the end of 2007

(I) The fraction of the quantity of diesel saved to the quantity of petrol saved can be calculated as follows

= 3300/21000

= 11/70

(II) The fraction of the quantity of CNG saved to the quantity of diesel can be calculated as follows

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marshall27 [118]

Answer:

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Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(6-2)/(7-(-5))

m=4/(7+5)

m=4/12

simplify

m=1/3

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