$a) \: \cos(39°) = \frac{x}{7} \Leftrightarrow x = 7\cos(39°) \approx5.44 \\ b) \: \sin(46°) = \frac{8}{x} \Leftrightarrow x = \frac{8}{\sin(46°)} \approx11.12$

8 0

3 years ago

A theater has 30 rows of seats. There are 22 seats in the first row, 26 in the second row, 30 in the third row, etc. How many pe

OLga [1]

Arithmetic Sequence

rows ---------32-n

first term ------------26-----------a

d---------------------------4

Sn = n/2( 2a+(n-1)d)

=32/2 (2*26+(31)4)

=16(52+124)

=16(176)

=2816 seats

4 0

3 years ago

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A B means:

SVETLANKA909090 [29]

Answer:

A is a subset of B i believe that's the answer

8 0

3 years ago

What is the area of this polygon?

Orlov [11]

Answer: 45 square inches

Step-by-step explanation:

6 0

3 years ago

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