Answer:
3³
Step-by-step explanation:
Using the rule of exponents
= 
Given
= 
= 3³
Simple 38487283847482828910101010101010010294587585858584839395848
Answer:
150=
x, or 4(150)=x
Step-by-step explanation:
Let's use x to represent the total number of pages in the book.
If 150 is a quarter of the whole book, then 150 is equal to a quarter of x
150= .25(x)
We an go further and multiply both sides by 4 to cancel the .25
4(150)=x
We can finish solving and x=600 pages
She worked as a carpenter for 12 hours and as a blacksmith for 18 hours.
Assuming you mean she earned $20 as a carpenter and $25 as a blacksmith per hour, with a total of 30 hours for $690,
let c represent carpenter hours and b for blacksmith hours.
20c + 25b = 690
c + b = 30
Subtract b from each side so that c = 30 - b
Plug this value into the first equation
20(30 - b) + 25b = 690
600 - 20b + 25b = 690
600 + 5b = 690
5b = 90
b = 18
To find c, plug this value of b into the other equation
c + 18 = 30
c = 12
