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Diano4ka-milaya [45]
3 years ago
14

Help quickly please!

Mathematics
1 answer:
Kisachek [45]3 years ago
3 0

Answer:


Step-by-step explanation:

Given: GF=\frac{1}{2}GC,

GE=\frac{1}{2}GD and EF=\frac{1}{2}DC

To prove: ΔGFE is similar to ΔGCD.

Proof: Since, \frac{GF}{GC}=\frac{1}{2}, \frac{GE}{GD}=\frac{1}{2} and \frac{EF}{DC}=\frac{1}{2}, therefore

\frac{GF}{GC}=\frac{GE}{GD}=\frac{EF}{DC}

Hence, by transitive property of equality, ΔGFE is similar to ΔGCD.

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10. Given a = 7, b = 6, and c = 10, use the Law of Cosines to solve for A. Round your answer to the nearest degree.
tia_tia [17]

Answer:

10) 44° (nearest degree)

11) 136.6 units² (nearest tenth)

12) 47.8 units² (nearest tenth)

Step-by-step explanation:

Please see the attached pictures for the full solution.

6 0
3 years ago
The mean number of daily surgeries at a local hospital is 6.2. Assume that surgeries are random, independent events. (a) The cou
Scilla [17]

Answer:

a) correct option is

Poisson distribution is 6.2 and standard deviation is 2.49

b) probability for only 2 or less than 2  surgeries  in a given day is 0.0536

Step-by-step explanation:

Given data:

mean number is given as 6.2

correct option is

Poisson distribution is 6.2 and standard deviation is 2.49

we know that variance is given as\sigma^2 = mean = 6.2

hence, standard deviation is given as \sqrt{6.2} = 2.48998

thus standard deviation is 2.49

correct option is

Poisson distribution is 6.2 and standard deviation is 2.49

b) probability for only 2 or less than 2  surgeries  in a given day is

P(X \leq 2) = P(X =0) + P(X =1) + P(X =2)

                 = \frac{e^{-6.2} 6.2^0}{0!} +\frac{e^{-6.2} 6.2^1}{1!} +\frac{e^{-6.2} 6.2^2}{2!}

                 = 0.002029 + 0.012582+ 0.039006

                 = 0.053617

                = 0.0536

7 0
3 years ago
Slope of (-2,5)and(7,8)
grigory [225]

Answer:

The slope is 1/3

Step-by-step explanation:

8 – 5 = 3

_____________

7 – -2 = 9

3/9=1/3

4 0
3 years ago
Read 2 more answers
Please help fast for 10 points and bro list!! And it’s multiple choice!!! ANSWER ONLY IF YOU KNOW!! PLEASE EXPLAIN PREFER AND EX
xxTIMURxx [149]

Answer:

D (x-10)

Step-by-step explanation:

x^2 - 8x - 20

(x -10)(x+2)

7 0
3 years ago
In which quadrant is ( 5,4 ) is located<br>this is hw and i wanna get a good grade plz helpp!!!!
Andre45 [30]
(5,4)

On a system of 2 perpendicular axis with O as origine, the pair (5,4) means:

5 is the distance from the origin O and situated on x-axis (on the right of O)
4 is the distance from the origin O and situated on y-axis (above O)

Then the pair (5,4) is situated in the 1st Quadrant

8 0
3 years ago
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