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blsea [12.9K]
4 years ago
6

What is m∠C ? Anyone willing to help me (:

Mathematics
1 answer:
ra1l [238]4 years ago
5 0

Answer:

<h2>50°</h2>

Step-by-step explanation:

Use the cosine law:

AB^2=CB^2+CA^2-(CB)(CA)\cos(\angle C)

We have:

AB=6,\ CB=6.5,\ CA=7.5

Substitute:

6^2=6.5^2+7.5^2-2(6.5)(7.5)\cos(\angle C)

36=42.25+56.25-97.5\cos(\angle C)

36=98.5-97.5\cos(\angle C)           <em>subtract 98.5 from both sides</em>

-62.5=-97.5\cos(\angle C)           <em>divide both sides by (-97.5)</em>

\cos(\angle C)\approx0.641\to m\angle C\approx50^o

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Two angles are supplementary. If one angle measures twice the other, and the number of degrees in the smaller angle.
Svetllana [295]

Answer:

60 Degrees

Step-by-step explanation:

Supplementary means it equals 180 together, so you divide it by 3 because the one is twice as big and you take the smaller answer

\frac{180}{3} =60

4 0
3 years ago
Simplify the expression <br> 7r^3 (r^-2)^2 / 20(r^4)^-5
Zolol [24]

Use combine like terms the answer is 7r^2-r-1

8 0
3 years ago
There are 3200 students at Lake High School and 310 of these students are sophomores. If 38 of the sophomores are in favor of th
Oduvanchick [21]

Answer: 3128 students

Step-by-step explanation:

Total no of students in the school : 3200

No of sophomores in favor of the school forming a crew team : 38

No of the remaining students in favor of forming a crew team : 34

Total students in favor of forming a crew team = 38+34= 72

No of students against it : Total students - Students in favor

                                          = 3200-72 = 3128 students

5 0
3 years ago
PLEASE HELP!!!! WILL GIVE BRAINLIEST<br><br>(20 PTS)
ioda

Answer:

Well 5 cups.

Step-by-step explanation:

Well you see, you have this right:

2*10=20

in which 2 equals Blue, 10 equals Yellow, and result equals green, so now we have 1 instead of 2, right? So that means 2:2=1, so you got to do this:

2*10=20

(2:2)*(10:2)=1*5=5, So the final answer is 5 cups of yellow cups Now please give me 20 pts

6 0
3 years ago
Whic
Nana76 [90]

Answer: 180 cm

Step-by-step explanation: 1 decimeter = 10 centimeter

18 dm = 10 * 18 cm

18 dm = 180 cm

Would appreciate brainly <3

3 0
3 years ago
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