Given that C varies partly as A and partly as the square of A and that C=20 when A= 2 and C=21 when A=...

      

Given that C varies partly as A and partly as the square of A and that C=20 when A= 2 and C=21 when A= 3, determine the value of C when A = 4.

  

Answers


Kavungya
C =hA+kA2
20=2h+4k
h+2k=10…………..(i)
21=3h+9k
h+3k=7…………….(ii)
h+3k=7
h+2k=10
k=-3
h-6=10
C=16a-3a2
C = 16 x 4-3 x16
C = 64-48
C = 16
Kavungya answered the question on September 21, 2019 at 07:29


Next: Ann, Betty and Caro agreed to share some amount of money in the ratio 3:4:2. If Betty got twice as much as Caro and Ann...
Previous: Ainisha maneno katika sentensi ifuatayo:- Shehena ya dawa ilikuwa bandarini

View More Mathematics Questions and Answers | Return to Questions Index


Exams With Marking Schemes

Related Questions