Answer:
$5
Step-by-step explanation:

The item is discounted by $5 per week.
Answer:
The GCF is 7.
Factors of 21 - 1, 3, 7, 21
Factors of 56- 1, 2, 4, 7, 8, 14, 28, and 56
Factors of 7- 7
Step-by-step explanation:
Answer:

Therefore, the first choice is correct.
The graph of the inequality is also attached below.
Step-by-step explanation:
Considering the inequality

solving










In other words,

Therefore, the first choice is correct.
The graph of the inequality is also attached below.
Answer:
20
Step-by-step explanation:
lol
Answer:
k=5
Step-by-step explanation:
We are provided with function, f ( x ) = 3
+ kx − 13
which is divided by x+4 gives 15.
Here,
since f(x) is divided by x+4 so we can put :
x+4 = 0
x= -4
Putting this in f(x) -----> f(-4)
f(x) = f(-4) = 3 (
) + k(-4) − 13
f(-4) = 3(16) - 4k - 13
f (-4) = 48 - 4k - 13 ------------------------------------------Equation 1
Since, when f(x) is divided by x+4 , the remainder is 15 so we can say,
f(-4) = 15
putting in equation 1
f (-4) = 15 = 48 - 4k - 13
48 -4k - 13 = 15
35 - 4k = 15
35 - 15 = 4k (Moving - 4k on right hand side and 15 on the left)
or 20 = 4k
or 4k = 20
k = 
<h2>
k = 5</h2>