5.In which of the following sentences is the word formidable used incorrectly? A. Summiting Mt. Everest is a formidable task for even the most experienced climbers.

B. The tiny mouse was a formidable foe for the tough cat living in the farmer’s barn.

C. Cleaning the whole house before her grandmother arrived seemed a formidable job to Rianna.

D. The older players on the varsity football team seemed quite formidable to the young squad.

B

Explanation:

for·mi·da·ble

/ˈfôrmədəb(ə)l,fərˈmidəb(ə)l/

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adjective

inspiring fear or respect through being impressively large, powerful, intense, or capable.

"a formidable opponent"

the second sentence is a great revision in my opinion. that would be a great topic.

explanation:

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4