Two trains leave the station at the same time, one heading east and the other west. the eastbound train travels at 80 miles per hour. the westbound train travels at 70 miles per hour. how long will it take for the two trains to be 420 miles apart? do not do any rounding.

Question: How long will it take for the two trains to be 420 miles apart if two trains leave at the same time one going east and the other going west, with speed 80 miles per hour and 70 miles respectively. The number of hours to take them to have a distance of 420 can be computed as follows:

Let x= the number of hours

80x+70x=420

150x=420

x=420/150

x=2.8 hours

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

the correct answer option is (2x-3)(2x+3).

step-by-step explanation:

we are given the following expression and we are to factorize it:

we are to find such factors that when multiplied they give a result of 36 (9 x 4 = 36) and when added they give a result of 0.

the two such factors of 36 are negative six and postive six.

factorizing the given expression to get:

therefore, the correct factorization of is (2x-3)(2x+3).