Answer:

Step-by-step explanation:
Given:

Required
Multiply
The above can be written as

Split the above expression

Collect like terms

Apply first law on indices



Hence,
is equivalent to 
Answer:
-4.2
Step-by-step explanation:
Answer:
72°
Step-by-step explanation:
This is called an isosceles triangle. This means that the 2 angles related to the equal sides, are also equal. Hence, the answer is 72°
It should be 986m
4(17x6)= 408
2(17x17)= 578
408+578=986
(10 lb 6 oz)-(7 lb 11 oz) = 2.6875 lb