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NARA [144]
3 years ago
13

100 points and brainliest! geometry please explain :) thanks for reading this :)

Mathematics
1 answer:
scoundrel [369]3 years ago
7 0

Hellooooo!! Marie Here!!!

The answer is here:

The value of "x" is 9

<h3>Hope This Helps!!! Have A GREAAATTTT Day!!</h3>
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An auditorium has 20 rows with 10 seats in the first row, 12 in the second row, 14 in the third row, and so forth. How many seat
Nina [5.8K]

Answer: there are 580 seats

Step-by-step explanation:

The number of seats in each row is increasing in arithmetic progression.

The formula for determining the sum of n terms of an arithmetic sequence is expressed as

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

Where

a represents the first term of the sequence.

d represents the common difference.

n represents the number of terms in the sequence.

From the information given,

a = 10 seats

d = 2 seats (the seats in each row are increasing by 2)

n = 20(number of rows)

We want to determine the number of seats in 20 rows. Therefore

S20 = 20/2[(2×10 + (20 - 1)2]

S20 = 10(20 + 38) = 10×58

S = 580

8 0
3 years ago
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I'll give brainliest<br><br> reflect (-4,4) in the x-axis
harina [27]

Answer:

(-4,-4)

Step-by-step explanation:

Anytime you reflect a coordinate point across the x-axis, the y-coordinate becomes its opposite and the x-coordinate stays the same.

In this coordinate: (-4,4)

Reflecting (-4,4) across the x-axis means the x-coordinate (-4) would stay the same and the y-coordinate (4) would become its opposite (-4).

The new coordinates after being reflected across the x-axis are (-4,-4).

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3 years ago
L shcool W clash royale ​
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Answer:

<h3>THEY ARE CONGRUENT BY <em><u>ASA</u></em> TEST OF CONGRUENCE</h3>
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What is a valid prediction about the continuos function
Elodia [21]

Answer:

EX: f(x) ≥ 0 over the interval [-1, 1].

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Yakvenalex [24]

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Step-by-step explanation:

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