Answer: 16 hours
Step-by-step explanation:
Given
Carla earns 
for each hour she works
Last week she earned $148 total including 
tip
So, the sum of hourly income and must be equal to the total money earned
Suppose she works for 
hours
Thus, she works 16 hours last week
If x represents the width of the poster (including borders), the area of the finished poster can be written as
.. a = x*(390/(x -10) +8)
.. = 8x +390 +3900/(x -10)
Then the derivative with respect to x is
.. da/dx = 8 -3900/(x -10)^2
This is zero at the minimum area, where
.. x = √(3900/8) +10 ≈ 32.08 . . . . cm
The height is then
.. 390/(x -10) +8 = 8 +2√78 ≈ 25.66 . . . . cm
The poster with the smallest area is 32.08 cm wide by 25.66 cm tall.
_____
In these "border" problems, the smallest area will have the same overall dimension ratio that the borders have. Here, the poster is 10/8 = 1.25 times as wide as it is high.
Answer:
En la expresión, 2 representa la cantidad de veces que multiplicas x por sí mismo.
**Lo siento si mi español es malo, el inglés es mi primer idioma.
Step-by-step explanation:
= 8 × 8 = 64
= y × y
Answer:
x<-3
Step-by-step explanation:
-16x-12>36
-16x>48
x<-3
Answer:
406 pieces. If you multiply 58 times 7 you get 406. 406 divided by 58 is 7.
