A, C, and E will be your correct answers! When 16:28 is simplified we get 4:7. When we simplify 20:35 we get 4:7. therefore, A, C, and E will be correct!
Answer:
gradient is the same as slope
so m=9
Step-by-step explanation:
y=9x+C. insert point(1,4)
4=9*1+C
4-9=C
C=-5
so the equation of the line is y=9x-5
Answer:
They're the same angle. I would look up transversals so you could understand it a bit more. I'll upload a picture of a transversal in my answer but you should search it anyways.
Anyways,
To solve, you set 160 equal to the other side.
160 = 3x + 10
150 = 3x
x = 50
Answer:
Length of the thread = 30 metres
Step-by-step explanation:
Length of the thread in one round of a reel = Circumference of the reel
C = 
Since radius of the reel = 
= 
= 2.5 cm
Circumference of the reel = 2(π)(2.5)
= 5π
= 5×3
= 15 cm
Length of the thread wound in one round around the reel = 15 cm
Since, thread is wound 200 times round a reel, length of the thread
= 200 × 15
= 3000 cm
≈ 30 metres
Therefore, Option (B) will be the answer.