hw+t3w2

Working with Positive and Negative Numbers: Positive + Positive = Positive: 5 + 4 = 9 Negative + Negative = Negative: (- 7) + (- 2) = - 9 Sum of a negative and a positive number: Use the sign of the larger number and subtract (- 7) + 4 = -3 6 + (-9) = - 3 (- 3) + 7 = 4 5 + ( -3) = 2 Negative - Positive = Negative: (- 5) - 3 = -5 + (-3) = -8 Positive - Negative = Positive + Positive = Positive: 5 - (-3) = 5 + 3 = 8 Negative - Negative = Negative + Positive = Use the sign of the larger number and subtract //(Change double negatives to a positive)// (-5) - (-3) = ( -5) + 3 = -2 (-3) - ( -5) = (-3) + 5 = 2 Positive x Positive = Positive: 3 x 2 = 6 Negative x Negative = Positive: (-2) x (-8) = 16 Negative x Positive = Negative: (-3) x 4 = -12 Positive x Negative = Negative: 3 x (-4) = -12 Positive ÷ Positive = Positive: 12 ÷ 3 = 4 Negative ÷ Negative = Positive: (-12) ÷ (-3) = 4 Negative ÷ Positive = Negative: (-12) ÷ 3 = -4 Positive ÷ Negative = Negative: 12 ÷ (-3) = -4
 * 1) **Adding Rules:**
 * 1) **Subtracting Rules:**
 * 1) **Multiplying Rules:**
 * 1) **Dividing Rules:**

Now here are some for you to try: Simultaneous Equations: (a) What do x and y equal? 3x + 4y = 10 2x + 5y = 9
 * 1. || ( -40 ) + 51 =............ || 2. || ( -86 ) + 53 = ||
 * 3. || ( -68 ) + 97 = || 4. || ( -88 ) + 19 = ||
 * 5. || ( -63 ) + 40 = || 6. || ( -38 ) + 62 = ||
 * 7. || ( -62 ) - 38 = || 8. || ( -56 ) - 83 = ||
 * 9. || ( -18 ) - 90 = || 10. || ( -83 ) - 13 = ||
 * 11. || ( -26 ) - 51 = || 12. || ( -59 ) - 87 = ||
 * 13. || ( -24 ) : 4 = || 14. || ( -18 ) : 3 = ||
 * 15. || ( -2 ) : 1 = || 16. || ( -3 ) : 1 = ||
 * 17. || ( -12 ) : 3 = || 18. || ( -12 ) : 6 = ||
 * 1. ( -44 ) x 9 =............ ||  || 2. ( -35 ) x 0 = ||   ||
 * 3. ( -87 ) x 5 = ||  || 4. ( -49 ) x 8 = ||   ||

(b)What do x and y equal? 3x − 2y = 9 −x + 3y = −3

(c) What do x and y equal? 2x − y = 5 3x + 4y = 2

(d) What do x and t equal? 5x + 7t = 8 7x − 4t = 25

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