Answer:
x = 8
Step-by-step explanation:
The sum of the measures of two complementary angles is 90°.
m<C + m<D = 90°
5x + 7x - 6 = 90
12x = 96
x = 8
It’s definitely d. -96,96
1. 600
2. 650
3. 400
4. 2,500
5. Handball and Bicycling
6. 1,650
7. Swimming and Walking
8. 3-hour walk
9. Cross-Country Skiing
10. 8
11. about 7
12. 12
13. 1-5 million
a). (17º-17'-17") = 17<span><span>º + 17'/60 + 17"/3600 = </span>17.288055...</span><span>º
</span>17.288055...º / 4 = 4.322...º = <em>4</em><span><em>º - 19' - 19.25" </em><em /></span><span><== <span>a resposta</span>
b) (18º: 8 + 23º: 4 - 8º)
18</span><span>º / 8 = 2.25</span><span>º
23</span><span><span>º / 4 = </span> 5.75</span><span>º
(2.25</span><span>º + 5.75</span><span><span>º </span>- 8º) = <em>0</em></span> <== a resposta
