recall that
sin(x) = cos(90-x)
therefore
cos((2/3)x + 20) = cos(90 - [2x - 10])
(2/3)x + 20 = 100 - 2x
2x + (2/3)x = 80
divide through by 2
x + (1/3)x = 40
(4/3)x =40
4x = 40*3
4x = 120
x = 30
since it is a right angled triangle, the angles are 30, 60 and 90
Answer:
perpendicular
Step-by-step explanation:
The lines are not parallel because the slopes are not equal. However, they are perpendicular because perpendicular lines' slopes are opposite reciprocal. (×negative with the denominator and numerator switched.)
Answer:
3
Step-by-step explanation:
Answer:
4 Times 5 equals = 20
Step-by-step explanation:
<em>4 Goes into what number 5 times. 20 ÷ 4 = 5</em>
Answer:
They each get 8 cookies
Step-by-step explanation:
24 divided by 3 is 8. There are other ways if the question allows there to. be some cookies left over.
