Question

please give step by step answer ill give brainilest and a follow​

Answer 1

Answer:

20 ....pls mark me brainliest:)

Step-by-step explanation:

Let the target time be t.A and B are company.

A received 810 cards order and took t+3 days to complete it.

Card printed per day by A=810t+3B received 900 cards order and took t−6 days to complete it.

Card printed per day by B=900t−6According to the question:

810t+3+5=900t−6

⇒810+5t+15t+3=900t−6

⇒825+5tt+3=900t−6⇒

(t−6(825+5t)=900(t+3)

⇒825t−4950+5t2−30t=900t+2700

⇒5t2−105t−7650=0

⇒t2−21t−1530=0

⇒(t−51)(t+30)=0t=51, −30

Therefore, t=51 daysCard printed per day by A=810t+3=81054=15

Card printed per day by B=900t−6=90045=20