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Kisachek [45]
3 years ago
11

2. Which of the following relations is/are function/s?

Mathematics
1 answer:
Tasya [4]3 years ago
4 0
B. and D. are functions
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Help me please<br>I want the step by step explanation!!​
DiKsa [7]

Answer: AB=√17, AD=√98,6

Step-by-step explanation:

AB²=BC²+AC²-2*BC*AC*cosACB

AB²=5²+4²-2*5*4*0,6=25+16-24=17

AB=√17

AD²=AC²+CD²-2*AC*CD*cosACD

cosACD=cos(180°-ACB)=-cosACB

AD²=4²+7²-2*4*7*(-0,6)=16+49+33,6=98,6

AD=√98,6

4 0
3 years ago
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14 a and b please and thank u
Murrr4er [49]

I don't know the answer, but I suggest downloading the app: PhotoMath. It scans a math problem and shows you how to complete the problem. I hope this helped~!

7 0
3 years ago
Find the slope of the points 2,8 and 12,55
Ber [7]

Answer:

m = 4.7

Step-by-step explanation:

If you plug in these values in the slope formula, this is what happens:)

7 0
3 years ago
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Mark and peter went to an arcade where the machines took tokens. Marilk played 9 games of ping pong and 5 games of pinball, usin
Readme [11.4K]

Answer:

9x + 5y = 29 ........... (1) and

3x + y = 7 ........... (2)

Each game of ping pong requires 1 number of token and each game of pinball requires 4 number of tokens.

Step-by-step explanation:

Let, each game of ping pong requires x number of tokens and each game of pinball requires y number of tokens.

So, from the given conditions we can write

9x + 5y = 29 ........... (1) and

3x + y = 7 ........... (2)

Now, solving equations (1) and (2) we get,

9x + 5(7 - 3x) = 29

⇒ 35 - 6x = 29

⇒ 6x = 6

⇒ x = 1 token.

Now, putting x = 1 in equation (2) we get,

3 + y = 7

⇒ y = 4 tokens.

So, each game of ping pong requires 1 number of token and each game of pinball requires 4 number of tokens. (Answer)

6 0
3 years ago
Which are solutions of the equation (x + 5)(x – 3) = 0? Check all that apply.
djverab [1.8K]

Answer:x=-5 and x=3

Step-by-step explanation:

(X+5)(x-3)=0

X+5=0 or x-3=0

X=-5 or x=3

6 0
4 years ago
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