Question

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Find the value of the following algebraic expressions using the indicated constant.

1. a + b; a = 2 and b = 3

2. m – n; m= 5 and n = 4

3. x + y – z; x = 1, y = 2 and z = 3

4. 9x; x= 2

5. 5m; m= 1

6. 4a +5; a= -3

7. 2p -3r; p = 2 and r = 1

8. 3m – 2n; m=1 and n=4

9. 2x² + 1; x= -1 *

10. 3w³ + 2w² - 5w + 4; w= 1

Answer 1

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Answer 2

1. 2+3 = 5
2. 5-4 = 1
3. 1+2-3=0
4. 9x2 = 18
5. 5x1 = 5
6. 4(-3)+5 = -12+5= -7
7. 4-3 = 1
8. 3-8 = -5
9. 2+1 = 3
10. 3+2-5+4 = 5-5+4 = 4