Answer:
6
Step-by-step explanation:
Use your fingers 13-7=6
Answer:
y = 8 and x = -32.5
Step-by-step explanation:
#5 .
<1= 85
<2= 95
<3= 85
<4= 95
#7=
<1= 154
<2= 26
<3= 154
<4= 26
Answer:
17.2°
Explanations
To find angle A, use the cosine rule.
a^2 = b^2 + c^2 - 2 × a × c cos A
4^2 = 7^2 + 10^2 - 2 × 7 × 10 cos A
16 = 49+ 100 - 140 × cosA
16 = 149 - 140cosA
16- 149 = - 140cosA
-133 = - 140cosA
cosA = 133/140
cosA = 0.95
A = 17.2°
