Answer: 1. Correct, 2. Incorrect 90° angle not 80° angle answer is 50, 3. Is correct, 4. Is correct
Step-by-step explanation:
Answer:
8x-99
Step-by-step explanation:
18+73-2+16+73=89
8x-10 - 89 = 8x-99
162 - 9 = 153.
d = 153.
Diego is old.
I will assume that this question is about scientific notation (also assuming that the first number is 3.4*10^2), where you can arrange the numbers by the exponent of the 10, so from least to greatest:

,

, 435, and