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Feliz [49]
3 years ago
6

Helppppppp meeeeeee I don’t understanddddd

Mathematics
1 answer:
scoundrel [369]3 years ago
5 0

Answer:

DF = 9.5

Step-by-step explanation:

Given 2 secants from an external point to the circle, then

The product of the external part and the whole of one secant is equal to the product of the external part and the whole of the other secant, that is

DE × DF = DC × DB

5(5 + x) = 5(5 + 4.5) ← divide both sides by 5

5 + x = 5 + 4.5

5 + x = 9.5 ( subtract 5 from both sides )

x = 4.5

Then

DF = DE + EF = 5 + 4.5 = 9.5

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How do you solve this whole thing please?
NemiM [27]

Answer:

Step-by-step explanation:

Let's look at the first two, and hopefully you'll be able to figure the rest out:

1. Answer below

d = rt

The problem asks us to solve for r, so that means we need to get r on one side of the equation by itself. To do so, we will need to divide both sides of the equation by t:

\frac{d}{t} = \frac{rt}{t}

\frac{d}{t} = r

2. Answer below

B = T - Lc

The problem asks us to solve for T, so that means we need to get T on one side of the equation by itself. To do so, we will need to add Lc to both sides of equation:

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7 0
3 years ago
Find AB. Round to the nearest tenth if necessary.<br>​
shusha [124]

Answer:

I think the right answer would be 7

Step-by-step explanation:

We got-ta use the equation: CA * BA = DA²

CA = 15 + BA

DA² = 8² = 64

=> (15 + BA) BA = 64

Subtract 15 from each side:

BA(BA) = 49

BA² = 49

Now take the square root of each side

BA = 7

Hope this helps!

3 0
2 years ago
Two cyclists start from 98 miles apart and begin racing toward each
kati45 [8]

The speed of one bicyclist was 14.5mph, speed of the other bicyclist was 17.5mph.

Let the speed of one bicyclist=x mph

Let the speed of the other bicyclist=(x+3) mph

Hence:

Speed of one bicyclist:

3x+3(x+3)+2=98

3x+3x+9+2=98

6x=87

Divide both side by 6x

x=87/6

x=14.5 mph

Speed of the other bicyclist:

x+3 mph

14.5 mph+3 mph

=17.5 mph

Inconclusion the speed of one bicyclist was 14.5mph, speed of the other bicyclist was 17.5mph.

Learn more here:

brainly.com/question/18839894

3 0
2 years ago
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Alexus [3.1K]

Answer:

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yw :D

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zlopas [31]

Step-by-step explanation:

anything greater than 195.

8 0
3 years ago
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