You need to use the cosine for this and this is how you do it.
5(7y + 2)
Distribute (multiply) the 2 to the numbers in the parentheses.
35y + 10
Answer:
10X^2-42X+8=0
Step-by-step explanation:
Multiply all whats inside the brackets, i.e 5x*2x = 10^2
and 5x*8 =40x and -1*2x =-2x
add that you get -42x
AND Finally
-1*-8 = 8
Step-by-step explanation:
(x + y , x - y) = (4 , 2)
x+y=4 ------(1)
x-y=2 ------(2)
_____ (adding two equation)
2x=6
x=3
From equation 1
3+y=4
y=1
