Answer:
Properties of operations help a lot in solving problems related to integers and rational numbers.
<u>Step-by-step explanation:</u>
There are four properties of operations in math. These properties are applicable in case of addition and multipication but not in case of division and subtraction.
These properties are used to solve problems involving rational numbers as well as integers.These properties are associative,commutative, distributive and identity.
commutative property is A+B=B+A
⇒5+4=4+5
and A*B=B*A
⇒5*4=4*5
associative property ( 32+14)+7= 32+(14+7)
( 8*9)*7= 8*(9*7)
Identity property is 35+0= 35
1*58=58
distributive property is 15*21
⇒ 15*(20+1)
⇒15*20+15*1
15*21
⇒ 15*(22-1)
⇒15*22-15*1
You can use a simple cross product to find your answer
15$/27$ = 100%/x%
To find x: (27*100)/15 = x
Answer:
Angle ADC = 180°-60° = 120°
Step-by-step explanation:
We could actually do without the additional detail pertaining to 75°. However, we could find angle CDB by difference. The solution would be 120°-75° = 45°. But this is not anymore needed by the problem because it is not asked. I guess the 75° is just a distraction.
Sqrt 128 to get 11.31
You can do Pythagorean theorem. One side is 8, and since this is a square, the other side is 8. 8 squared plus 8 squared is 128, then square root it. Treat it like a right triangle
