Answer:
C)
Step-by-step explanation:
By the cos double angle formula, we know Substituting into the formula, we get
.
The answer is C.
( -15 ) + ( -9 )
= -24
Have a nice days............
Answer:
Step-by-step explanation:
The diagonals of a rectangle are equal.
2x + 10 = 56 That minus sign can't be there. Subtract 10 from both sides.
2x = 56 - 10 Combine
2x = 46 Divide by 2
x = 46/2
x = 23
8 can go into 71 seven times