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Svetach [21]
3 years ago
15

Someone please help me with these 2 questions I will mark brainlist!!!!

Mathematics
1 answer:
Tamiku [17]3 years ago
8 0
ANSWER for the first one:
A=a+b/2*h
A= 4.5+9/2*6
A= 40.5 cm2

ANSWER for the second one:
9*3= 27
3*3= 9
9*3= 27
A= 63 cm2
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A deck of cards contains 30 cards with labels 1, 2, . . . , 30. Suppose that somebody is randomly dealt a set of 7 cards of thes
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\displaystyle |\Omega|=\binom{30}{7}=\dfrac{30!}{7!23!}=\dfrac{24\cdot25\cdot\ldots\cdot30}{2\cdot3\cdot\ldots\cdot 7}=2035800

a)

\displaystyle\\|A|=\binom{15}{3}\cdot \binom{15}{4}=\dfrac{15!}{3!12!}\cdot\dfrac{15!}{4!11!}=\dfrac{13\cdot14\cdot15}{2\cdot3}\cdot\dfrac{12\cdot13\cdot14\cdot15}{2\cdot3\cdot4}=13\cdot7\cdot5\cdot13\cdot7\cdot15=621075\\\\P(A)=\dfrac{621075}{2035800}=\dfrac{637}{2088}\approx30.5\%

b)

\displaystyle\\|A|=\binom{10}{7}\cdot 3^7=\dfrac{10!}{7!3!}\cdot2187=\dfrac{8\cdot9\cdot10}{2\cdot3}\cdot2187=4\cdot3\cdot10\cdot2187=262440\\\\P(A)=\dfrac{262440}{2035800}=\dfrac{243}{1885}\approx12.9\%

4 0
2 years ago
Someone please answer this question, I have been asking for all my life!!!! I WILL DO AN ASSIGNMENT FOR YOU IN EXCHANGE JUST NOT
antiseptic1488 [7]

Answer:

not sure about the answer, but its asking why does the umbrella sale fluctuate when there is more rain or less rain. divide the numbers vertical to each other then look at the month with the mist compared to the least

8 0
3 years ago
Which pair of triangles MUST be similar?
Dvinal [7]

Answer:

C

Step-by-step explanation:

The total measurement of a triangle is 180

Triangle 7 has a 40 degree angle and 35 degree angle.

40+35=75

180-75=105

Triangle 8 has the same angle that is 40 degrees and 105. And if you do the same math, you would get 35 for the missing angle of triangle 8

8 0
3 years ago
It takes 1/3 pint of paint to cover a birdhouse. There are 12 and 1/3 pints of paint in a can. Write and evaluate a division exp
VashaNatasha [74]

Answer:

37 birdhouses

Step-by-step explanation:

Given:

It takes 1/3 pint of paint to cover a birdhouse.

There are 12 1/3 pints of paint in a can.

Question asked:

Write and evaluate a division expression to find the number of bread houses that can be painted.

Solution:

<em><u>We will solve it by unitary method:</u></em>

By using \frac{1}{3} pints of paint, we can paint = 1 birdhouse

By using 1 pints of paint, we can paint = \frac{1}{\frac{1}{3} }=1\times3=3\ birdhouses

By using  12\frac{1}{3} pints of paint, we can paint =3\times12\frac{1}{3}

                                                                   =3\times\frac{12\times3+1}{3} \\\\ =3\times\frac{37}{3} \\ \\ =3\ canceled \ by\ 3\\=37\ birdhouses

Thus, 37 birdhouses can be painted by using 12\frac{1}{3} pints of paints.

5 0
4 years ago
Suppose you deposit $1000 in a savings account that pays 4.8% interest compounded semiannually. How much will you have in your a
Rashid [163]
Answer is 0.048*1000*0.5
3 0
3 years ago
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