Question

1. 3x²-x-4

Evaluate , , so that the vector F ⃗ is given by F ⃗= (2x + 3y + az)ı ⃗+ (bx + 2y + 3z)ȷ ⃗ + (2x + cy + 3z)k ⃗ is irrotational

i want to ask the Q27 marked in the photo.

fig 7.24

1. The average age of three people is 27 years. Their ages are in the proportion of 1: 3: 5.what is the age in years of the youngest one among them?

The average age of three people is 27 years. Their ages are in the proportion of 1:3:5 what is the age of the youngest one among them?

Area related to circles is very difficult for me 

 . Say a easy way to understand it . Any suggestions need 

The average of three people is 27 years. Their ages are in the proportion of 1: 3: 5 what is the age in years of the youngest one among them?

The average age of three people is 27 years. Their ages are in the proportion of 1: 3: 5.what is the age in years of the youngest one among them?

Altitude of a right triangle is 7cm less than its base.if the hypotenuse is13 cm.find the other two sides