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mario62 [17]
3 years ago
12

I need this question for unit test

Mathematics
1 answer:
krek1111 [17]3 years ago
3 0
The answer is this:
A. (6,3)
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If CDE ~ GDF, find ED
qaws [65]

Answer:

10

Step-by-step explanation:

\triangle CDE \sim \triangle GDF.. (given) \\\\\therefore \frac{CD}{GD} =\frac{DE}{DF}.. (csst) \\\\\therefore  \frac{15}{x+3} =\frac{3x+1}{4}\\\\ \therefore   \: 15 \times 4 = (x + 3)(3x + 1) \\  \\ \therefore   \: 60 = 3 {x}^{2}  + x + 9x + 3 \\  \\ \therefore  3 {x}^{2}  + 10x + 3 - 60 = 0 \\ \therefore  3 {x}^{2}  + 10x  - 57 = 0 \\ \therefore  3 {x}^{2}  + 19x - 9x  - 57 = 0 \\ \therefore   \: x(3x + 19) - 3(3x + 19) = 0 \\\therefore   \:  (3x + 19)(x - 3) = 0 \\ \therefore   \: 3x + 19 = 0 \:  \: or \:  \: x - 3 = 0 \\  \therefore   \: x =  -  \frac{19}{3}  \:  \: or \:  \: x = 3 \\  \because \: x \: can \: not \: be \:  - ve \\ \therefore   \: x = 3 \\ ED = 3x + 1 = 3 \times 3 + 1  \\ \huge \red{ \boxed{ ED= 10}}

7 0
3 years ago
Which of these is the best definition of an ellipse?
MArishka [77]

Answer:

I think it's B.

Step-by-step explanation:

Sorry if I'm wrong :/

4 0
3 years ago
Read 2 more answers
What is 1/10th of 2,871,000?
abruzzese [7]
This is fairly simple. Divide 2,871,000 by 10 and that's your answer!

\frac{2,871,000}{10} =287,100

Also, since you're dividing by a factor of 10 (or in this case, <em>10</em>) you can just take away as many places as are zeros in the number you're dividing from. This works for <em>10, 100, 1,000, 10,000, etc. </em>In this case, since there is only one zero in 10 you only take away one place marking, which gives you 287,100.
7 0
3 years ago
How many matches are played together in a knockout tournament involving 36 teams?
Svetradugi [14.3K]

Answer:

need points srry

Step-by-step explanation:

8 0
3 years ago
last night Eli read 1\4 of his book before he fell asleep. how much of the book does he have left to read?​
TiliK225 [7]

Answer: 3/4

Step-by-step explanation:

4/4 - 1/4 = 3/4

6 0
3 years ago
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