Did I get this right? If I did t could someone explain it to me

Mathematics

2 answers:

gregori [183]2 years ago

8 0

You are correct, by using vertical line test, all these are functions except graph b because there is more than one y output to one x input.

Kisachek [45]2 years ago

3 0

Answer:

Yes, you are correct.

Step-by-step explanation:

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Find c and round to the nearest tenth. thank you in advance

PSYCHO15rus [73]

Answer and Step-by-step explanation:

90ft = a

55ft = b

50ft = c

Plug into equation.

$50^{2} = 90^{2} + 55^{2} - 2(90)(55)cosC\\\\2500 = 11125 - 9900(cosC)\\\\-8625 = -9900(cosC)\\\\0.8712 = cosC\\\\cos^{-1} (0.8712) = C\\\\29.4$

29.4° is the answer.

4 0

2 years ago

A tree casts a shadow 24 feet long. a 5 foot person casts a 8 foot shadow.How tall is the tree?

ra1l [238]

(length of tree's shadow)/(height of tree) = (length of person's shadow)/(person's height)

24/x = 8/5

24*5 = x*8

120 = 8x

8x = 120

8x/8 = 120/8

x = 15

The tree is 15 feet tall

8 0

3 years ago

Evaluate each expression.<br> log327 =<br> log121 =<br> logo 25 =<br> log, 128 =

qwelly [4]

Part 1:
3,0,-2,7
Part 2:
A,C,D

7 0

2 years ago

What is the value of x

Gemiola [76]

For this case, we observe that the triangles are similar.
We observe that the triagnules have three equal angles.
Therefore, to find the value of x we can use the following relationship:
$x / 15 = 5/12
$
Clearing x we have:
$x = (5/12) * (15)

x = 6.25$
Answer:
The value of x is given by:
x = 6.25

4 0

3 years ago

Please answer this correctly

Ilia_Sergeevich [38]

Answer:

9/49

Step-by-step explanation:

The probability of landing on an even number is 3/7.

Because there are only 3 numbers even out of 7 total numbers.

$3/7 \times 3/7$