Being in zero gravity causes the (expand) of a person's spinal discs.

Being in zero gravity causes the expansion of a person's spinal discs.

Explanation:

In the given blank, the word to be placed will be the correct form of the word in parenthesis. This means that the given word "expand" will be changed according to the form of the sentence.

The blank in the sentence will be filled with the word "expansion". Now, the word "expansion" is a noun that means an increase in size, to become bigger. And in that context, the final sentence will become

Being in zero gravity causes the expansion of a person's spinal discs.

the rhetorical technique most used in this excerpt is parallelism. parallelism is a technique which author used in sentence as substitute of repeated synthetical similarities. it is the effect of rhetorical technique.

explanation:

x=4, y=4

step-by-step explanation:

y=2x-4;

x+2y=12

we can use substitution since the first equation is solved for y

where ever you see y in the second equation, replace it with 2x-4

x + 2(2x-4) = 12

distribute the 2

x+4x-8 = 12

combine like terms

5x-8=12

add 8 to each side

5x-8+8=12+8

5x=20

divide by 5

5x/5 = 20/5

x =4

we still need to solve for y

y = 2x-4

we know x =4

y = 2(4) -4

y = 8-4

y=4