Question

please answer please please please please please please​

Answer 1

Answer:

A38 : 10

A39 : 8 m/s

A40 : 11 , -12

Step-by-step explanation:

A38 :

6.2x = 8.1² - 1.9² = 65.61 - 3.61 =62

6.2x = 62

∴ x = 62/6.2

⇒ x = 10

A39 :

distance = 120 m

fime = 15 s

speed = distance/time

s = d/s

∴ s= 120/15

⇒ s = 8 m/s

A40 :

y² + y - 132 = 0

⇒ (y-11)(y+12) = 0

∴ y = 11 , -12

Hope You Understand

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