Answer:
Step-by-step explanation:
For a number to be divisible by 4 you just need to worry about the 10s and 1s place. You also want to know that the 1s cylce every 20, or in other words:
4 8 12 16 20
24 28 32 36 40 and so on. So the only numbers that x can be there are 1, 3, 5, 7, 9. Does that make sense? and can you manage the rest?
Answer:
I hope this helps:)
Step-by-step explanation:
1) last number times 4 and subtract 1
2) last number times2 and add 2
3) you figure out
Note: a² - b² = (a-b)(a+b)
9x² - 16y² = (3x)² - (4y)² = (3x - 4y)(3x + 4y)
Answer:
58 square feet
Step-by-step explanation:
The room is already broken down into two smaller rectangles.
The smaller of the two measures 4 ft by 2 ft. 
, so substitute 4 for 
and 2 for 
.
(smaller rectangle) 
, or 
.
(smaller rectangle) 
The larger measures 10 ft by 5 ft, so using the same method, multiply times .
(larger rectangle) 
, or 
.
(larger rectangle) 
Add the two rectangles' areas together to find the total area of the room.
8 + 50 = 58
