Answer:
x=-0.6
Step-by-step explanation:
-3x-3=-1
-3x=-1+3
-3x=2
x=-2/3
Answer:
The minimum cost is $17.30c
Step-by-step explanation:
Given
--- Volume
--- cost of wall paint
---cost of ceiling paint
Required
Minimum cost of paint
The volume is calculated as:
Substitute 288 for V
Make z the subject
The surface area is calculated as:
Because xy represent the dimension of the ceiling and the opposite of the ceiling (the floor) will not be painted. Hence, it does not require a coefficient of 2
The cost is:
Substitute
Differentiate w.r.t x and y
By comparison:
Set them equal to 0
Substitute x for y
Cross multiply
Take the cube root of both sides
Substitute 6 for x and for y in
--- approximated
Answer:$46,150.00
Step-by-step explanation:
21.50 multiplied by 2200 =47,300.00 salary for the year
47,300 +650= 47,950 salary plus interest
47,950- 1,800=46,150.00
Answer:
Step-by-step explanation:
Let numbers be x and y
<u>Then we have equations:</u>
<u>Comparing</u>
- 4y = y + 87
- 4y - y = 87
- 3y = 87
- y = 87/3
- y = 29
<u>Then, the larger number is</u>