Question

Self Practice 7B
1. (a) x + 7 for x = 2
(b) y - 7 for y = 10
(c) 5a for a = 2
(d) 7a - 3 for a = 1
(e) 9d for d = 0
(f) 16 - 4y for y = 4
2. (a) y - 2x for y = 25, x = 7
(b) 3a + 4b for a = -1, b = 2
(c) 5(y - x) for x = 1.5, y = 3.5
(d) 10x + z- y for x = 3, y = -5,2 = 7
3. (a) 4x2 for x = 3
(b) a² + 3b for a = 2, b = -1
(c) 36 - 2x2 for x = 4
(d) x2 + y for x = -1, y = -2
4. From the formula A = 3a + 5b - 8c - 29, find the value of A when a = 18, b = 0, and c= -3.
Evaluate each expression for the given value of the variable.​

Answer 1

Answer- Answers are attached in the photos. Each and every question has been solved.