Question

42. The sum of three numbers is 2. If twice the second number is added to the
Sum of first and third, we get 1. On adding the sum of second and third
numbers to five times the first, we get 6. Find the three numbers by using

matrices

43. The cost of 4 kg potato, 3 kg wheat and 2 kg rice is R 60. The cost of 1 kg
potato, 2 kg wheat and 3 kg rice is 45. The cost of 6 kg potato, 2 kg wheat

and 3 kg rice is

70. Find the cost of each item per kg by matrix method.

44. An amount of R 5000 is put into three investments at 6%, 7% and 8% per
annum respectively. The total annual income from these investments is
358. If the total annual income from first two investments is 70 more
than the income from the third, find the amount of each investment by the

matrix method.​

Answer 1

Answer:

first, the three numbers are (-1),(1),(2)

second, potato= R5 per kg

wheat= R8 per kg

rice = R8 per kg

sorry, the last question is unknown to me

consider plz