Evaluate each expression if r = 5, s = 2, t = 7, and u = 1. 1. s + 7 2. 9 – u 3. 3t + 1

4. 5r - 4 5. t – s 6. u + r

7. 11t – 7 8. 6 + 3u 9. 4r – 10s

10. 32 11. 22 – 18 12. 2 + 8

13. 2 14. 30 15. (3+)28

Evaluate each expression if a = 4.1, b = 5.7, and c = 0.3.

16. a + b – c 17. 10 – (a + b) 18. b – c + 2

19. MOON The expression 6 gives the weight of an object on the Moon in pounds with a weight of w pounds on Earth. What is the weight of a space suit on the Moon if the space suit weighs 178.2 pounds on Earth?

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

cosine

step-by-step explanation:

42.4

step-by-step explanation:

convert to decimal

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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