Answer:
Step-by-step explanation:
a² - b² = (a+ b)(a - b)
1) (2n-4/2n) ÷ (n^2-4/n)

2) [y^2-36/y^2-49] ÷[ y+6/y-7]

3) [m^2-1/ m^2-m] ÷ [m^2-7m-8/3m
]

Hint : m² - 7m - 8
sum = -7
Product = -8
Factor = (-8), 1
m² - 7m - 8 =m² - 8m + m - 8
= m*(m - 8) + (m-8)
= (m - 8)(m +1)
Step-by-step explanation:
4(3x-2) + 6x(2-1)
10x + 11x
21x
Cosine = adjacent / hypotenuse
cosine = 1 / square root (2)
Let C be the center of the circle. The measure of arc VSU is
, so the measure of the minor arc VU is
. The central angle VCU also has measure
.
Triangle CUV is isosceles, so the angles CVU and CUV are congruent. The interior angles of any triangle are supplementary (they add to 180 degrees) so


UT is tangent to the circle, so CU is perpendicular to UT. Angles CUV and VUT are complementary, so



So finally,

degrees.

is the same as

. The 4s will cancel leaving you with

or

, your 3rd option.