Question

Please help me I need help asap

Answer 1

Explanation:

Because they tell us it's an isosceles triangle we know two sides are the same length. since AB and AC look like they are similar we can assume that those sides are the exact same length. Since we know , now, that AB and AC are equal in length, set them equal

AB = AC

now plug in given info

5x-7 = 23

nice, now use your super hero algebra skillz to solve for X. My calculus prof. always says that students are bad at algebra, i'll help you do the algebra.

5x-7=23 ( add 7 to both sides)

5x=23+7 (add 7 to 23 )

5x=30 (divide both sides by 5 )

x=6

yay, we have X now.

we know AB =23 , because of the isosceles triangle thing.

BC = 3x-5

plug in for X :)

3*6-5=BC

18-5=BC

13=BC

Yay, all the answers, and way to get the answers are above :P

Answer 2

AB = 23 , BC = 13

Explanation:

Isosceles mean two side angle is equal to each other.

AB and AC are the same. So we can solve for x.

`AB=AC\\5x-7=23\\5x=30\\x=6\\\\AB = 5x-7\\AB = 5*6-7\\AB=30-7\\AB = 23\\\\BC = 3x-5\\BC = 3*6-5 = 18 - 5 = 13\\BC = 13`