Answer:
<u>A.</u><u> </u><u>138°</u>
Step-by-step explanation:
hope it helps u...
Answer:
1. $33
2. 25%
3. 20%
4. Masako
5. 53.20
6.57.46
Step-by-step explanation:
21 divide by 4 is 5.25. She travels 5.25 miles per hour. 42 divide by 5.25 is 8. It would take 8 hours for Shelly to bike 42 miles.
Answer:
12 payemst of 66.66
Step-by-step explanation:
1300 - 500 = 800/ 12 = 66.66
Law of cosine:
c² = a² +b² -2ab*cosC.
Because the triangle is equilateral a=b=c=x,
and we can write,
x²=x² +x² -2xx*cosC
x² =2x² -2x²* cos C
-x² = -2x²*cos C
cos C= 1/2,
so m∠C=60⁰.
Because all sides are equal, and across of the equal sides should be equal angles, all angles will be also equal and = 60⁰.