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Elanso [62]
4 years ago
9

The River Ridge High School auditorium has exactly 27 rows of seats. The rows are labeled, in order, from the front of the audit

orium to the back from A through AA. There are 9 seats in the row A. Each row after the first row has three more seats than the previous row. How many seats are there in row AA?
Mathematics
2 answers:
hichkok12 [17]4 years ago
5 0

Answer:

  87

Step-by-step explanation:

The numbers of seats in each row form an arithmetic sequence. The general term (an) of such a sequence is given in terms of the initial value (a1) and the common difference (d) as ...

  an = a1 + (n-1)·d

The 27th term of the sequence with first value 9 and common difference 3 is ...

  a27 = 9 + (27-1)·3 = 9 +78 = 87

There are 87 seats in row AA.

Sauron [17]4 years ago
3 0

Answer:  95 seats


Step-by-step explanation:

I added 3 to each row starting with the 9 seats, up to 27 rows.

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What is the area of the triangle?
liberstina [14]

Answer:

48

Step-by-step explanation:

A = bh/2

A= 8 x 12 / 2

A= 96 / 2

A = 48

3 0
3 years ago
In the figure below, lines 1 and 2 are parallel. Lines 3 and 4 are also parallel.
attashe74 [19]
I don’t see a diagram, but I assume that you must use these things.

Opposite interior angles. (Which are equal)
Same side interior angles (which are supplementary or they add up to 180)
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5 0
4 years ago
UCF is a major Metropolitan University located in Orlando Florida. UCF is advertising their bachelor in Economics with the stati
Arlecino [84]

Answer:

The claim is rejected

Step-by-step explanation:

Claim: UCF is advertising their bachelor in Economics with the statistic that the starting salary of a graduate with a bachelor in economics is $ 48,500 according to Payscale (2013-13).

Null hypothesis: H_0: \mu = 48500

Alternate hypothesis :H_a : \mu \neq 48500

n = 50

Since n is more than 30 .

So we will use Z test

x=43350

Standard deviation = 15000

Z=\frac{x-\mu}{\frac{s}{\sqrt{n}}}\\Z=\frac{43350-48500}{\frac{15000}{\sqrt{50}}}\\Z=-2.42

Refer the z table

p value = 0.00776

\alpha = 0.01

p value < \alpha

So, We are failed to accept null hypothesis

Hence The claim is rejected

5 0
4 years ago
In 2001 the mint indoor pool vault record was 20 and 1/6 the women’s record for the indoor pool vault was 15 and 5/12 FT what is
blondinia [14]

Answer:

35 and 7/12 feet is the combined height of the two records.

Step-by-step explanation:

Height of the indoor pool vault record for men = 20 and 1/6 ft =\frac{121}{6} ft

Height of indoor pool vault record for women = 15and 5/12 ft =\frac{185}{12} ft

The combined height of the two records :

\frac{121}{6} ft+\frac{185}{12} ft

\frac{121\times 2}{6\times 2} ft+\frac{185}{12} ft

\frac{242}{12} ft+\frac{185}{12} ft

\frac{242+185}{12} ft=\frac{427}{12}=35\frac{7}{12}

35 and 7/12 feet is the combined height of the two records.

5 0
3 years ago
Jamie went to the his 6 friends. For each friend, he spent $4.75 for a sandwich, $1.25 for a cold beverage, and $.56 for a piece
masha68 [24]

Answer:

Jamie spent $39.36 in total.

Step-by-step explanation:

First, add the money spent for the sandwich, beverage, and fruit together.

4.75 + 1.25 + .56 = 6.56

Then, multiply the amount spent for one friend by six to find the total.

6.56 x 6 =39.36

I hope this helped you!

8 0
4 years ago
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