Step-by-step explanation:
arccos(sin(5π/4))
= arccos(sin(-π/4))
= arccos(-√2/2)
= 3π/4.
2=120
7= 11y +21
9= 28x+88
1
Answer:
44 dollars
Step-by-step explanation:
if one super-size gronola bar costs $4
Then 11 x 4 = 44
5/8 + 7/8 is 12/8
12/8 = 1 4/8
1 4/8 + 13 = 14 4/8
14 4/8 = 14 2/4 = 14 1/2
14 1/2
A straight line is 180°. The angles of QRT (2x + 33) and TRS (5x - 21) make up the 180° angle. So you can do:
∠QRT + ∠TRS = 180°
(2x + 33) + (5x - 21) = 180°
2x + 33 + 5x - 21 = 180 Combine like terms
7x + 12 = 180 Subtract 12 on both sides
7x = 168 Divide 7 on both sides
x = 24
Now that you found x, you can find the angles of QRT and TRS.
m∠QRT = 2x + 33
= 2(24) + 33
= 48 + 33
∠QRT = 81°
m∠TRS = 5x - 21
= 5(24) - 21
= 120 - 21
∠TRS = 99°
