you can use the distributive property
assume a 1 in front of the prenthasees
93+1(68+7)
distribute
93+68+7
use communtative property to move around
93+7+68
add
100+68
168
commutative and distributive
Difference Between Factors and Multiples. A factor is a number that leaves no remainder behind after it divides the specific number.
Recall that for all t,
cos²(t) + sin²(t) = 1
Now,
x = 5 cos(t) - 7 ⇒ (x + 7)/5 = cos(t)
y = 5 sin(t) + 9 ⇒ (y - 9)/5 = sin(t)
so that substituting into the identity above, we get
((x + 7)/5)² + ((y - 9)/5)² = 1
which we can rewrite as
(x + 7)²/25 + (y - 9)²/25 = 1
(x + 7)² + (y - 9)² = 25
and this is the equation of a circle centered at (-7, 9) with radius 5.
