Answer:
alice is 50 years old
Step-by-step explanation:
Answer:
4
Step-by-step explanation:
the scaling factor is 1.5 to go from DEF to QRS.
so,
EF × 1.5 = RS = 6
EF = 6 / 1.5 = 6/1 / 3/2 = 6×2 / 1×3 = 12/3 = 4
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°
Answer:
No solution
Step-by-step explanation:
The given system of equations are ,
- 3x - y = -1
- y = 3x - 5 = y-3x = -5
Adding both equations ,
=> 3x - y + y -3 x = -1-5
=> 0 = -6
Since we arrived at a contradiction the given pair of equations have No solution .
