Answer:
D
Step-by-step explanation:
In functions like this, its best to pay attention to the end points of the rays.
On the lower line:
it ends at x -1
because it is a closed circle, that means x can also equal -1.
x≤-1
On the upper line:
it starts at -1
it is an open circle, meaning x cannot be -1
x>-1
Answer:
<h2>
Joe should choose $2100 + 4% of Sales</h2>
Step-by-step explanation:
The options available to Joe are ($1800 + 6.5% of sales) and ($2100 + 4% of sales) for his salary. He chooses the option in which he would get higher salary. Sales are expected to lie between $5000 and $10000.
Let the sales be denoted by 
(in Dollars). Joe chooses first option if it is a higher number than the second.
⇒ if 
So, he chooses first option if 
. However sales is between $5000 and $10000. So, Joe will go with second option.
∴ Joe should choose $2100 + 4% of sales.
The number of decorative pillows did the realtor arrange on each twin bed and queen bed is 6 and 9 respectively.
<h3>Simultaneous equation</h3>
let
- Number of decorative pillows for twin bed = x
- Number of decorative pillows for queen bed = y
x + y = 15
2x + y = 21
From equation (1)
x = 15 - y
- Substitute x = 15 - y into (2)
2x + y = 21
2(15 - y) + y = 21
30 - 2y + y = 21
- 2y + y = 21 - 30
-y = -9
y = 9
Substitute y = 9 into
x + y = 15
x + 9 = 15
x = 15 - 9
x = 6
Learn more about simultaneous equation:
brainly.com/question/16863577
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3 gallon is enough for 60 student,
15=3
15 x 4= 60
3x 4 =12
12 quarts= 3 gallon
