Answer: -4x+2y=12
Step-by-step explanation:All you have to do is multiply the variables one after the other taking note of the sign
Answer:
-7
Step-by-step explanation:
Answer:
:)
Step-by-step explanation:
For simplicity I will substitue 
for β.
In the first step I used the identity
And I factored out 
Then it's just simple algebra to cancel till the 3rd step where we used another identity derived from the Pythagorean Theorem.
That's it!
Answer:
The area of a rectangle is 5/4
Step-by-step explanation:
Remark
Let the pigs = p
Let the chickens = c
Givens
30 heads is another way of saying that there were 30 creatures in the barnyard. In addition each chicken has 2 legs and each pig has 4
c + p = 30
2C + 4P = 100 (2) Divide (2) by 2
C + 2P = 50 (3) Subtract (1) from (3)
<u>C + P = 30</u>
P = 20
So there were 20 pigs.
