Which equation represents this sentence?
three less than the product of seven and a number is four more than the number.
a. 3−7n+4=n
b. 7n−3+4=n
c. 3−7n=n+4
d. 7n−3=n+4

Let

n--------> the number

we know that

1) the sentence" Three less than the product of seven and a number"  represent the expression------>  

2) the sentence" is four more than the number"  

represent the expression ------->  

3) the complete sentence" Three less than the product of seven and a number is four more than the number"  represent the expression

represent the expression ------->  

therefore

the answer is

b.an increase in a causes b to decrease

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