Given the system of equations presented here:

2x + 4y = 14
4x + y = 20

which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? (5 points)

a
multiply the second equation by −4 to get −16x − 4y = −80

b
multiply the second equation by −1 to get −4x − y = −20

c
multiply the first equation by 2 to get 4x + 8y = 28

d
multiply the first equation by −1 to get −2x − 4y = −14

its totaly b

your welcome btw

well if he bought them at 5 cedis each sold them at 7 cedis each then he would make a profit of 2 cedis of each book. if in total he made 150 cedis profit that means he sold 75 books. he lost 12 books at the start so that means he originally bought a total of 82 books.

step-by-step explanation:

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!