Question

Evaluate each expression if a = 4, b = 2, and c = 7.

1. 3ac
2. 563
4 5 + 6c
7.54
64
10. 2bc
3x
13. 7c
5. ab
8. c-a
11. ac - 36
14. 6a - b
3. abc
6. 2a-3b
9. 20-be
12. 6a²
15. ab - c

Answer 1

Expressions with given values for a, b, and c are substituted and calculated to yield results such as 3ac = 84 and ab = 8. Expressions with incorrect information were omitted.

Step-by-step explanation:

To evaluate each expression given the values a = 4, b = 2, and c = 7, we substitute the values into each expression and perform the arithmetic calculations.

1. 3ac = 3 × 4 × 7 = 84
2. 5 + 6c = 5 + 6 × 7 = 47
3. 2bc = 2 × 2 × 7 = 28
4. 7c = 7 × 7 = 49
5. ab = 4 × 2 = 8
6. c - a = 7 - 4 = 3
7. ac - 36 = (4 × 7) - 36 = 28 - 36 = -8
8. 6a - b = (6 × 4) - 2 = 24 - 2 = 22
9. abc = 4 × 2 × 7 = 56
10. 2a - 3b = (2 × 4) - (3 × 2) = 8 - 6 = 2
11. 20 - be = 20 - 2 × 2 = 20 - 4 = 16
12. 6a² = 6 × 4² = 6 × 16 = 96
13. ab - c = (4 × 2) - 7 = 8 - 7 = 1

Note that we have skipped the expressions labeled as 2., 4., 7., 9., 10., 12., 13., and 15. since they either contain apparent typos or incomplete information.