2 years ago

Help, these are yes or no answers.

Mathematics

1 answer:

djverab [1.8K]2 years ago

3 0

Answer:

7:yes

8:no

9:yes

10:sorry

Step-by-step explanation:

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17. Evaluate a. 6! b. 8P5 c. 12C4

Andreyy89

The factorial ! just means we multiply by every natural number less that the value so
6! =6×5×4×3×2×1= 720

for permutations we use the formula n!/(n-r)!
so we have 8!/(8-5)!=8!/3!=8×7×6×5×4

for combinations s we have n!/(n-r)!r!
so we have 12!/(12-4)!4!=12!/8!4!=12×11×10×9/4×3×2=11×10×9/2=99×5

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2 years ago

Gloria purchased a hot chocolate with extra marshmallows for $4.59 before tax. She lives in Iceland where the sales tax rate is

dsp73

About ten cents. $4.68 total

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2 years ago

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icang [17]

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2 years ago

Read 2 more answers

Please help I'm desperate :(

zubka84 [21]

Answer:

$x=5$

Step-by-step explanation:

<u>Similar Triangles</u>

By looking at the construction of the figure, we can safely assume both triangles are similar, i.e. their internal angles are equal and their sides are proportional. Following the proportion of the heights and bases of both triangles we can set this relationship:

$\displaystyle \frac{45}{36}=\frac{5x}{20}$

Simplifying both fractions

$\displaystyle \frac{5}{4}=\frac{x}{4}$

Solving for x

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2 years ago

A person who is 3 m tall casts a shadow that is 6 m long. At the same time, a building

podryga [215]

Answer:

13.5 meters

Step-by-step explanation:

25 / 2 = 13.5

because if a human is 3 meters tall and cast 2 times the length of himself then if a building casts 25 meters then it should be 2 times less than its shadow.

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2 years ago