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3 years ago

chord ab intersects chord hi at point c.the length of cb is 4 times the length of ac.find the length of ac

1 answer:

5 0

Chord AB = ?
Chord AB = AC + CB

Chord HI = HC + CI
HC = 7
CI = 28
Chord HI = 7 + 28 = 35

Chord AB = Chord HI

CB is 4 times the Length of AC. Let AC be X.

x + 4x = 35
5x = 35
x = 35/5
x = 7

AC = x = 7
CB = 4x = 4(7) = 28

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3 years ago

Under Plan A a 2 minute call costs .54 cents a 4 minute call costs 1.08. Under plan b the cost for x minutes is given by y=0.289

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Answer: Plan A is cheaper, because the cost of a 2-minute call and a 4-minute call is less than the cost of a 2-minute call and a 4-minute of Plan B call.

Step-by-step explanation:

1. You have the following information of Plan A:

- A 2 minute call costs .54 cents.

- A 4 minutes call costs $1.08.

2. For Plan B, you know that the cost of $x$ is given by the equation:

$y=0.289x$

3. Therefore, you can compare both plans by finding the cost of a call of 2 minutes and a call of 4 minutes of Plan B. You can calculate this by giving these values to $x$ :

$x=2\\x=4$

4. Substitute the values into the equation:

$y=0.289(2)=0.578cents$ (This is more expensive)

$y=0.289(4)=1.156dollars$ (This is more expensive)

5. Therefore, Plan A is cheaper, because the cost of a 2-minute call and a 4-minute call is less than the cost of a 2-minute call and a 4-minute of Plan B call.

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3 years ago