Question

y bez
4. From the sum of 1 + 2x and x2 - 2x + 11, subtract
.
the sum of x2 - 9x and -2x2 + x + 10.
5. From the sum of a + b + 5 and 2a - 3b + 10,
subtract the sum of 2a - 5b and a -6b + 12.
6. From the sum of m2 - 2n2 and 4m2 - 9n2 +15, subtract
the sum of 6m2 - 5n2 + 5 and m2 - 4n2 + 20.
7. From the sum of a2 + 3b2 and 2a2 - 5b2 + 7, subtract
the sum of 2a2 - 462 +6 and 5a2 - b2 + 13.​

Answer 1

Step-by-step explanation:

Following are the marks obtained in mathematics by 35 students

66, 71, 58, 81, 66, 71, 48, 69. 69.66.83. 73. 83, 69.64, 69, 48, 84,

66, 58, 58, 60, 64, 66, 71, 84, 69,

64, 73, 48, 64, 69, 85, 89,80