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Dmitry [639]
3 years ago
9

A theater has 20 rows of chairs. The first row has 16 chairs, the second has 18, the third has 20, and so on. In total, the thea

ter seats _____ people.
How many people does the theater seat in total?
Mathematics
2 answers:
Vlad [161]3 years ago
7 0

Answer:

700 seats in total just like the other person said, thanks <3

Step-by-step explanation:

Brilliant_brown [7]3 years ago
5 0
<span>This is an arithmetic progression, i.e. 16,18,20,22,24,26,28.......... where 16 is the number of people seats in 1st row, 18 seats in second row, 20 seats in third row and so on. The Total number of seats in 20 rows = n/2{2a+(n-1)d}. Here, d = 2 , n =20, a = 16. Thus, Sum = 10 {32+ 19*2} = 10 {70} = 700 seats in total. </span>
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Rufina [12.5K]

don't cheat its bad that u are asking answers for your test

6 0
3 years ago
Read 2 more answers
A climbing structure needs to be built in the shape of a square-based pyramid. Look at the diagram below. What is the perimeter
Marta_Voda [28]

Answer:

40 m

Step-by-step explanation:

The perimeter of the flat, orange shape is the sum of all the sides that forms a boundary around the shape.

The shape is made up of 4 triangles having 2 equal side lengths each, which surrounds the center square.

Each side length of the triangle, that forms a boundary round the shape = 5 m.

There are 8 of this equal side length.

Perimeter = 8(5m) = 40 m

7 0
2 years ago
A computer cost £900. It is on sale for 25% off. You also need to pay 6% sales tax. What is the final price of the computer?
Vesna [10]

First we have to find 25% of 900 pounds (i hope that's the right currency). so 900 x .25 = 225

so we subtract 225 from 900 and get 675 pounds.

to find sales tax we have to find 6% of 675, so 675 x .06 = 40.50

675 + 40.50 = 715.5 pounds

6 0
3 years ago
I need this answered as soon as possible
Rzqust [24]

Answer:

34

Step-by-step explanation:

basically you need to actually put something in the black photo there

8 0
3 years ago
Read 2 more answers
72 inches=___ yards please and thank you for your help
I am Lyosha [343]

We know that:

1yd=36in\text{.}

Then:

1in=\frac{1}{36}yd\text{.}

Therefore:

72in=72\cdot(\frac{1}{36}yd)\text{.}

Simplifying the above result we get:

72\cdot\frac{1}{36}yd=2yd\text{.}

Answer:

72\text{inches}=2\text{yards.}

6 0
1 year ago
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