Question

PLEASE HELP :) 20 POINTS FOR IT IF U JUST ANSWER LIKE IDK OR SUM IMMA REPORT

Answer 1

BC =
`1.8`

Explanation:

∆ABC is an equilateral ∆ because all three angles are equal. Therefore, all its sides would be equal also. This means AB = BC = AC

Thus, let's find the value of x.

`(7)/(4)x - 1 = (9)/(3)x - 3`

Collect like terms

`(7)/(4)x - (9)/(3)x = 1 - 3`

`(7x)/(4) - 3x = -2`

`(7x - 12x)/(4) = -2`

`(-5x)/(4) = -2`

Multiply both sides by 4

`(-5x)/(4)*4 = -2*4`

`-5x = -8`

Divide both sides by -5

`x = (8)/(5)`

AB = BC = AC

Therefore,

BC =
`(7)/(4)x - 1`

Plug in the value of x

BC =
`(7)/(4)*(8)/(5) - 1`

BC =
`(56)/(20) - 1`

BC =
`2.8 - 1`

BC =
`1.8`