Question

WILL GIVE BRAINLIEST

Answer 1

Substitution involves plugging the given values of the variables and the

parenthesis is a sign for multiplication (multiplied by).

The correct responses are as follows;

• 7. 2·(x + 4) + 10 = 28

• 8. 3·(4·x) + 4 = 64

• 9. 10·(x·y) = 300

• 10. 2·(x + y) = 22

• 11. 3·r × s + 4·x = 38

• 12. 2×q + 2×x + 2×t =  20

• 13. 6×3×t + 6×4×s = 144

• 14. 10×(10×x) + 10×y = 560

• 15. x·x·y = 150

• 16. r·s·t = 24

• 17. r·s·t·x·y = 720

• 18. 6·(2·x + 3·y) = 168

Methods by which the above responses are arrived at:

Given; q = 1; r = 2; s = 3; t = 4; x = 5; y = 6

7. 2·(x + 4) + 10, by substituting x = 5, we have;

• 2·(x + 4) + 10 = 2 × (5 + 4) + 10 = 28

8. 3·(4·x) + 4

Substituting x = 5 gives;

• 3·(4 × 5) + 4 = 64

9. 10·(x·y)

Substituting x = 5, and y = 6 gives;

• 10·(x·y) = 10 × (5 × 6) = 300

10. 2·(x + y)

Substituting x = 5, and y = 6 gives;

• 2·(x + y) = 2 × (5 + 6) = 22

11. 3·r·s + 4·x

Substituting r = 2, and s = 3, and x = 5, gives;

• 3·r·s + 4·x = 3 × (2 × 3) + 4×(5) = 38

12. 2·q + 2·x + 2×t  

Where, q = 1, x = 5, and t = 4, we get;

• 2·q + 2·x + 2·t = 2 × 1 + 2 × (5 + 4) = 20

13. 6·3·t + 6·4·s

Plugging in t = 4, and s = 3, we get;

• 6·3·t + 6·4·s = 6 × (3×4 + 4×3) = 144

14. 10·(10·x) + 10·y

x = 5, y = 6

• 10·(10·x) + 10·y = 10 × (10×5) + 10 × 6 = 560

15. x·x·y

x = 5, y = 6

Therefore;

• x·x·y = 5 × (5 × 6) = 150

16. r·s·t

r = 2, s = 3, t = 4

Therefore;

• r·s·t = 2 × (3) × (4) = 24

17. r·s·t·x·y

r = 2, s = 3, t = 4, x = 5, and y = 6

• r·s·t·x·y = 2 × 3 × 4 × 5 × 6 = 720

18. 6·(2·x + 3·y)

x = 5, y = 6

• 6·(2·x + 3·y) = 6 × (2 × 5 + 3 × 6) = 168

Formatted Responses to the Questions;

Please find attached a representation of the above responses in the question format

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