Ineed to find and write the equation for the problem.
layla wants to but a smart phone online using a $50 discount coupon along with a 20% discount on the original cost of the phone. layla can spend up to $150. write an inequality to find the original price of the smart phone she can afford.
(p = phone) variable i think it may be: (p-20%)-50 is less than or equal to 150 you

0.8p - 50 < = 150
0.8p < = 150 + 50
0.8p < = 200
p < = 200/0.8
p < = 250

the reason I set it up this way is because when it is 20% off, u r actually paying 80% of the original price (p)80% of the original price is written as 0.8p...then u subtract ur 50 dollar discount coupon...- 50and if all she can spend is 150it would be less then or equal to 150. So the most she can spend on the phone is 250

Ava is 112 cm  olivia is 89 cm