Question

If the distance between A(0,9) and B(a,0) is 15 units then find the
Value of 'a'.​

Answer 1

Answer:

by using distance formula

x=√(x1-x)² +(y1-y)²

15=√(a-0) ²+(9-0) ²

15=√(a-0) ²+(9) ²

15=√a²+9²

225=a²+81

225-81=a²

144=a²

a=12

so A(0, 9) &B(12, 0)

Answer 2

Answer:

a= 12

Step-by-step explanation:

let us take A(0,9),B=(a,0)

the distance between A and B =15 units

formula for the distance d=√((x_2-x_1)²+(y_2-y_1)²)

√(a-0)²+(0-9)²=15

√a²+(-9)²=15

√a²+81=15

a²+81=15²

a²+81=225

a²=225-81

a²=144

a=√144

a=12

I Hope it helps you ☺️