Anew and/or improved weapon used in world war i.

question 9 options:

airplanes

gun powder

atomic weapons

explosives

I believe the correct answer is A. or the first option Airplanes.

Explanation:

The first airplane was launched from a moving ship in May of 1912. The planes weren't as technologically advanced and needed to land on the water then be retrieved. So, the technological advancements weren't very well back then at all and Airplanes were one of the first new improved weapons during WW I to be used.

answer

explanation

the given equation is

we can rewrite this as:

let

then the equation becomes:

the factors of 8 that sum up to -9 are {-1,-8}

we split the middle term with these factors to obtain,

we factor by grouping to obtain:

apply the zero product property to get:

but

your answer will be b. improving roads, bridges, and other infrastructure. hope i !