Answer:
10x^2 +2x -9
Step-by-step explanation:
Group things that are alike and simplify
(3x^2+7x^2) = 10x^2
(2x) nothing to add or subtract with it so it stays positive 2x= +2x
(-5-4) = -9
Then put the answer from highest degree to lowest
Answer: 27/36
Step-by-step explanation: It says there are 36 bikes (18 pairs), meaning that there are 2 bikes per pair because 18 multiplied by 2 is 36.
1 pair (2 bikes) are yellow.
3 pairs (6 bikes) are red.
For purple, add yellow and red together: 2 + 6 = 8. Subtract the total number of bikes from this: 36 - 8 = 28 purple bikes.
If you take out 1 purple bike, this leaves you with 27. The probability of choosing a purple bike out of the total (36), is 27/36.
Please let me know if this is correct or wrong.
-32 x 5 = -160
-160/9 = -17.7777777778
if rounded it'll be -18 or -17.8