Use sigma notation to represent the sum of the first five terms of the following sequence: −5, −9, −13, …

the summation from n equals one to 5 of quantity negative 5 plus 4 times n
the summation from n equals one to 5 of quantity negative 1 minus 4 times n
the summation from n equals one to 5 of quantity negative 1 minus 5 times n
the summation from n equals one to 5 of quantity negative 1 plus 4 times n

the summation from n equals one to 5 of quantity negative 1 minus 4 times n

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction

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