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Kamila [148]
3 years ago
8

Teesha is in french club. there are 19 students in the club. The french teacher will pick two students at random to guide visiti

ng students from France. What is the probability that Teesha will not be picked up as a guide.
Mathematics
1 answer:
KiRa [710]3 years ago
8 0
To answer this we need to find the probability that teesha is not chosen for each pick, then multiply them together.

For the first pick, there are 19 students in the class, so teesha has a 18/19 chance of not getting chosen. For the second pick, one student has been removed, so there is now only a 17/18 chance Teesha is not chosen.

We now multiply the two probabilities together. 18/19 * 17/18 = 306/342

Simplify and we get 153/171.
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Cameron and Cadena go out to eat for lunch. Part A If their food and beverages cost $22.50 and there is a 9% meals tax, how much
Elan Coil [88]

Answer:

24.53

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Triangle ABC has AB=5, BC=7, and AC=9. D is on AC with BD=5. Find the length of DC
e-lub [12.9K]

Answer:

DC=\frac{8}{3}\ units

Step-by-step explanation:

The picture of the question in the attached figure

we know that

The triangle ABD is an isosceles triangle

because

AB=BD

The segment BM is a perpendicular bisector segment AD

so

<em>In the right triangle ABM</em>

Applying the Pythagorean Theorem

BM^2=AB^2-AM^2

we have

AB=5\ units\\AM=x\ units

substitute

BM^2=5^2-x^2

BM^2=25-x^2 -----> equation A

<em>In the right triangle BMC</em>

Applying the Pythagorean Theorem

BM^2=BC^2-MC^2

we have

BC=7\ units\\MC=AC-AM=(9-x)\ units

substitute

BM^2=7^2-(9-x)^2

BM^2=49-(81-18x+x^2)  

BM^2=49-81+18x-x^2

BM^2=-x^2+18x-32 ----> equation B

equate equation A and equation B

-x^2+18x-32=25-x^2

solve for x

18x=25+32\\18x=57\\\\x=\frac{57}{18}

Simplify

x=\frac{19}{6}

<em>Find the length of DC</em>

DC=AC-2x

substitute the given values

DC=9-2(\frac{19}{6})

DC=9-\frac{19}{3}\\\\DC=\frac{8}{3}\ units

8 0
3 years ago
Can somebody help me on this
kompoz [17]
I think the answer is A
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3 years ago
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