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Zanzabum
3 years ago
13

Please help me ASAP!!!

Mathematics
1 answer:
Paha777 [63]3 years ago
3 0

Answer:

A 70

Step-by-step explanation:

We know that angle B and angle C are equal because this is an isosceles triangle and the angles at the base of the equal sides are equal.

The three angles of a triangle add to 180 degrees

A + B+ C = 180

40 + C + C = 180    since B = C

Combine like terms

40 + 2C = 180

Subtract 40 from each side

40-40 + 2C = 180-40

2C = 140

Divide by 2

2C /2 =140/2

C = 70

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2. (For this problem, leave your answers in Combinatorics format – do NOT simplify). A conference is being held that faculty mem
SSSSS [86.1K]

Answer:

Follows are the solution to this question:

Step-by-step explanation:

please find the complete question in the attached file.

female = 23  and male = 19 faculty members

Randomly selected member are = 6

In point 1:

The Probability to equally selecting men and women:

= \frac{(23C3+19C3)}{42C6}

In point 2:

The Probability of selecting at least 4 men:

= \frac{((19C4 \times 23C2)+(19C5 \times 23C1)+(19C6))}{42C6}

In point 3:

The probability in which no women are chosen implies that 6 selected members are from 23 women:

= \frac{23C6 }{42C6}

In point 4:

The Probability in which no more than 4 women are selected:

\frac{((19C6)+(23C1 \times 19C5)+(23C2 \times 19C4)+(23C3 \times 19C3)+(23C4 \times 19C2))}{42C6}

8 0
3 years ago
Find a formula for the nth partial sum of the series and use it to find the series' sum if the series converges.
Arisa [49]

Answer: S_n=5(1-\dfrac{1}{n+1}) ; 5

Step-by-step explanation:

Given series : [\dfrac{5}{1\cdot2}]+[\dfrac{5}{2\cdot3}]+[\dfrac{5}{3\cdot4}]+....+[\dfrac{5}{n\cdot(n+1)}]

Sum of series = S_n=\sum^{\infty}_{1}\ [\dfrac{5}{n\cdot(n+1)}]=5[\sum^{\infty}_{1}\dfrac{1}{n\cdot(n+1)}]

Consider \dfrac{1}{n\cdot(n+1)}=\dfrac{n+1-n}{n(n+1)}

=\dfrac{1}{n}-\dfrac{1}{n+1}

⇒ S_n=5\sum^{\infty}_{1}\dfrac{1}{n\cdot(n+1)}=5\sum^{\infty}_{1}[\dfrac{1}{n}-\dfrac{1}{n+1}]

Put values of n= 1,2,3,4,5,.....n

⇒ S_n=5(\dfrac{1}{1}-\dfrac{1}{2}+\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{4}+......-\dfrac{1}{n}+\dfrac{1}{n}-\dfrac{1}{n+1})

All terms get cancel but First and last terms left behind.

⇒ S_n=5(1-\dfrac{1}{n+1})

Formula for the nth partial sum of the series :

S_n=5(1-\dfrac{1}{n+1})

Also, \lim_{n \to \infty} S_n = 5(1-\dfrac{1}{n+1})

=5(1-\dfrac{1}{\infty})\\\\=5(1-0)=5

4 0
3 years ago
Ummm... I dont know how to do this: raise the quotient of s and r to the 3rd power
denis23 [38]

Step-by-step explanation:

Quotient of s and r is s/r

s/r to the 3rd power = (s/r)^3

6 0
3 years ago
Can someone step by step help me answer the ones that aren’t done
notsponge [240]

Number 6

Answer:

y = (c - ax)/b

Step-by-step explanation:

ax + by = c

by = c - ax

y = (c - ax)/b

<em>I answered number 5 in your last question.</em>

3 0
4 years ago
Read 2 more answers
Please choose the **CORRECT** answer, and you'll recieve brainliest.<br> Answers shown below:
Lelechka [254]

Answer

x=6, y=21/2

Explanation

The 86 degrees is just to make you confused.

Since this is a congruent triangle, you can just follow these steps.

Line AB: To get from 4 to 6, you multiply by 1.5.

Line BC: Divide 9 by 1.5 to get x. 9 divided by 1.5 is 6.

Line AC: Multiply 7 by 1.5 to get y. 7 times 1.5 is 10.5.

So the correct answer is the first choice; x=6, y=21/2 (this is also 10.5).

6 0
3 years ago
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